Dd
damn [dæm] ....................CET6 考研 GRE
动 指责；咒骂
参考句型 it is no wonder that...
▶This play is awful. It is no wonder that it is damned by the reviewers（评论家）.
这部戏糟透了，难怪它被评论家们批评得一无是处。
damp [dæmp] .....................CET4 CET6 考研 TOEFL IELTS GRE
形 潮湿的
动 使潮湿
同 moist 潮湿的
参考句型 how about / what about...?
▶形 I don't like the damp weather in this city; what about you?
我不喜欢这个城市潮湿的天气，你呢？
▶动 How about damping your cloth before cleaning the windows?
擦窗户前先把布弄湿怎么样？
dead·line [ˈdedlaɪn] .........................考研 IELTS
名 最后期限
参考句型 it+be动词+adj.+of/for sb+to+v....
▶It is impossible（不可能的）for us to meet the deadline because of the terrible weather.
由于天气恶劣，因此我们无法如期完成任务。
de·clare [dɪˈkleə(r)]....................CET4 CET6 考研 TOEFL IELTS
动 宣告，公告
参考句型 there is no+名词+(in)+doing...
▶There is no point in declaring a war on such a weak country.
对一个弱小国家宣战毫无意义。
dec·o·ra·tion [ˌdekəˈreɪʃn] ..................TOEFL IELTS
名 装饰
参考句型 will / would you (please)...?
▶Will you tell me when you can finish the decoration of the living room?
你能告诉我你们什么时候才能把客厅装饰好吗？
de·crease [dɪˈkri:s] .......................OEFL IELTS
动 减少；减小
名 减少；减小
反 increase 增加
参考句型 I am afraid (that)...
▶动 I am afraid the population here will decrease year by year.
我担心这里的人口会逐年减少。
▶名 I am afraid that there will be some decrease in exports.
恐怕出口货物会有所减少。
de·feat [dɪˈfi:t] .................CET4 CET6 考研 IELTS
名 挫败，击败
动 击败，战胜
参考句型 I wish...
▶名 He was depressed by his defeat. I wish he could bounce back soon.
失败让他沮丧。但愿他能很快振作起来。
▶动 I wish our basketball team could defeat their team next season.
但愿我们的篮球队能在下个赛季中打败他们那队。
de·fend [dɪˈfend] .......................CET4 CET6 考研 TOEFL
动 保卫；防守
参考句型 I don't think / suppose / believe that...
▶I don't think this famous team defended well enough in the game.
我觉得这支名队在比赛中防守得不是很好。
de·fense [dɪˈfens] ......................CET4 CET6 考研 IELTS
名 防御
参考句型 what do you think of / about...?
▶Each attack is also a defense; what do you think about that?
每次进攻也就是防守，你觉得呢？
de·fen·si·ble [dɪˈfensəbl] ............................CET6 考研
形 可辩护的；可防御的
参考句型 I don't think / suppose / believe that...
▶I don't think the theory he put forward is defensible; do you agree?
我觉得他提出的理论站不住脚，你同意吗？
de·fen·sive [dɪˈfensɪv] ..........................TOEFL
形 防御的；保卫的
参考句型 there is no+名词+(in)+doing...
▶There is no good in adopting defensive attitudes; our plan is doomed（命中注定的）to failure.
采取守势也没什么用了，我们的计划注定是要失败了。
def·i·nite [ˈdefɪnət] .......................CET4 CET6 考研 TOEFL IELTS GRE
形 确定的
同 precise 确切的
参考句型 it is obvious / clear that...
▶It is obvious that they are unwilling（不愿意的）to give us a definite answer.
显然他们不愿意给我们一个明确的答复。
del·i·cate [ˈdelɪkət] ......................CET4 CET6 考研 TOEFL IELTS GRE
形 精细的；精巧的
参考句型 do / would you mind...?
▶Do you mind buying some delicate instruments for these scientists?
你介意为这些科学家们买些精密的仪器吗？
de·light [dɪˈlaɪt]..........................CET4 CET6 考研 IELTS
名 欣喜
动 使高兴
参考句型 it is no wonder that...
▶名 This paly was excellent. It is no wonder that the audience roared in delight．这部戏太棒了，怪不得观众们都兴高采烈地欢呼起来了。
▶动 This circus is very famous in Las Vegas; it is no wonder that the show delights everyone present.
这个马戏团的表演在拉斯维加斯非常有名，难怪每个在场的人都看得很开心。
de·light·ful [dɪˈlaɪtfl] .................CET4 CET6 考研 TOEFL IELTS GRE
形 令人欣喜的
参考句型 it is a pity (shame / surprise...) that...
▶It was a delightful party; it's a pity that you didn't come that day.
这是一次愉快的聚会，你那天没来真可惜啊。
de·mand [dɪˈmɑ:nd] .................. CET4 CET6 考研 GRE
名 要求
动 要求
参考句型 it is no wonder that...
▶名 He is the boss; it is no wonder that all of them caved in to his demand.
他是老板，难怪他们都屈从了他的要求。
▶动 She smokes; it is no wonder that she demanded a room all to herself last night．她有抽烟的习惯，怪不得昨晚她要求自己住一个房间。
dem·on·strate [ˈdemənstreɪt] .......................CET4 CET6 考研 TOEFL IELTS GRE
动 展现；表明
参考句型 what do you think of / about...?
▶This election demonstrated democracy in action; what do you think about it?
这次选举是以实际行动体现了民主，你觉得呢？
dem·on·stra·tion [ˌdemənˈstreɪʃn] .........................TOEFL
名 证明；示范
参考句型 how (what / when...)+to do...?
▶Will you give us a demonstration? We don't know how to use the machine．你愿意为我们做个示范吗？我们不知道如何使用这台机器。
dense [dens] ...................CET4 CET6 考研 TOEFL IELTS
形 密集的；稠密的
参考句型 it is no wonder that...
▶There was a dense fog; it is no wonder that the traffic slowed down.
因为有浓雾，难怪大家都减速行驶。
de·part [dɪˈpɑ:t] ..........................CET4 CET6 考研 TOEFL IELTS
动 离开，走开
同 leave 离开
参考句型 ...so that...
▶He departed early in the morning so that he wouldn't miss the early train．为了不错过早班的火车，他一大早就离开了。
de·par·ture [dɪˈpɑ:tʃə(r)] ...................CET4 CET6 考研 TOEFL
名 离去；出发
参考句型 I don't think / suppose / believe that...
▶I don't think he knows the exact departure time of the flight.
我认为他不知道飞机起飞的准确时间。
de·pend·a·ble [dɪˈpendəbl] ............................TOEFL
形 可靠的
参考句型 isn't (don't / can't / won't...)+sb...?
▶Don't you think he is a dependable and hard-working（努力工作的）worker?
难道你不认为他是一个值得信赖并且工作刻苦的人吗？
de·pend·ent [dɪˈpendənt] ............................CET4 CET6 考研 TOEFL
名 从属者
形 从属的；依赖的
参考句型 I am afraid (that)...
▶名 I am afraid once he loses his fortune, he will be a dependent.
一旦失去了自己的财产，恐怕他就会变成一个从属者。
▶形 I am afraid that I can't be dependent on my old parents any more.
恐怕我再也不能依靠我那年迈的父母了。
de·press [dɪˈpres] .....................CET4 CET6 考研 TOEFL IELTS
动 压下；降低
参考句型 how (what / when...)+to do...?
▶Rainy weather always depresses me and what's worse, I don't know what to do at home.
雨天总使我心情抑郁，更糟糕的是，我还不知道在家做什么好。
de·pres·sion [dɪˈpreʃn] .................CET6 TOEFL IELTS GRE
名 沮丧；萧条；降低
参考句型 or / otherwise...
▶The government must take actions at once, or we will have another Great Depression．政府必须立刻采取措施，否则我们将遭遇另一次大萧条。
de·serve [dɪˈzɜ:v] .....................CET4 CET6 考研 TOEFL IELTS
动 值得；应得
参考句型 what do you think of / about...?
▶Honors do not always go to those who deserve them; what do you think about that？荣誉并非永远属于应得的人，你觉得呢？
des·per·ate [ˈdespərət] .........................CET4 CET6 考研 TOEFL IELTS GRE
形 绝望的
参考句型 isn't (don't / can't / won't...)+sb...?
▶Don't you believe a desperate man will stop at nothing to get what he wants？难道你不相信一个亡命之徒为了达到自己的目的什么事都做得出来吗？
de·spite [dɪˈspaɪt] .....................CET4 CET6 考研
介 不管，不顾
参考句型 it is no wonder that...
▶People don't want to be delayed; it is no wonder that the plane took off despite the fog.
人们不希望延误行程，难怪即使有雾这架飞机还是起飞了。
de·struc·tion [dɪˈstrʌkʃn] ................CET4 CET6 考研 TOEFL
名 破坏，损坏
参考句型 I wish...
▶His desire for money will lead him to his destruction one day; I wish he could understand that soon.
对钱的欲望有一天终将导致他的毁灭，但愿他能很快明白这一点。
de·tec·tive [dɪˈtektɪv] ........................CET6 考研 TOEFL IELTS
名 侦探，探员
形 侦探的
参考句型 I don't think / suppose / believe that...
▶名 I don't think the detective can reason out how the murderer has escaped．我认为这名侦探无法弄明白凶手是如何逃脱的。
▶形 I don't think there is any detective agency here.
我认为这里没有侦探所。
de·ter·mi·na·tion [dɪˌtɜ:mɪˈneɪʃn] ......................CET4 CET6 IELTS GRE
名 决心
参考句型 I don't think / suppose / believe that...
▶I don't think he has the determination to overcome this difficulty.
我觉得他没有克服这个困难的决心。
de·vice [dɪˈvaɪs] ..........................CET4 CET6 考研 TOEFL IELTS
名 装置；设计
参考句型 the+比较级， the+比较级
▶A computer is a device for processing information; the more you use it, the more you know.
电脑是用来处理信息的。你用得越勤，了解的就越多。
de·vise [dɪˈvaɪz] ................CET4 CET6 考研 TOEFL IELTS GRE
动 设计；想出
参考句型 how (what / when...)+to do...?
▶He is devising how to do that thing, so please don't disturb him.
他正计划如何进行那件事情，因此请不要打搅他。
de·vote [dɪˈvəʊt] .........................CET4 CET6 考研 TOEFL IELTS
动 贡献，奉献
参考句型 it is no wonder that...
▶He likes to help people a lot; it is no wonder that he decides to devote himself to becoming a doctor.
他很喜欢帮助人。难怪他会决定投身于医疗事业。
di·a·per [ˈdaɪəpə(r)] .................. CET4 CET6 考研 IELTS
名 尿布
参考句型 will / would you (please)...?
▶Will you change the baby's diaper? I am a bit busy now.
你能帮孩子换一片尿布吗？我现在有点忙。
dif·fer [ˈdɪfə(r)] .................CET4 CET6 考研
动 不同，相异
参考句型 it is no wonder that...
▶You are not mature enough; it is no wonder that I differ with your opinion on this matter.
你还不够成熟，怪不得我们在这个问题上意见不一。
di·gest [daɪˈdʒest] .......................CET4 CET6 考研 TOEFL IELTS
动 了解；消化
名 摘要；分类
参考句型 it takes (sb)+一段时间+to+v. ...
▶动 It often takes us quite a long time to digest new ideas.
我们吸收新思想往往需要相当长的一段时间。
▶名 It took her ten minutes to read the digest of the week's news.
她花了十分钟的时间来读一周新闻摘要。
di·ges·tion [daɪˈdʒestʃən] .......................... TOEFL IELTS GRE
名 领会，领悟；消化
参考句型 why not...?
▶This kind of tea acts as an aid to digestion; why not have a try?
这种茶可帮助消化，为什么不试试呢？
dig·i·tal [ˈdɪdʒɪtl] ........................CET4 CET6 考研 IELTS
形 数字的；数码的
参考句型 what do you think of / about...?
▶What do you think of the digital camera? It's the latest model this year.
你觉得这款数码相机如何？它可是今年的最新款。
dig·ni·ty [ˈdɪgnətɪ] .....................CET6 考研 TOEFL IELTS GRE
名 威严；尊严
参考句型 what do you think of / about...?
▶In my opinion, only a truly（真正地）free person has human dignity;what do you think of that?
在我看来，只有真正自由的人才具有人的尊严，你觉得呢？
di·li·gence [ˈdɪlɪdʒəns] .................GRE
名 勤勉，勤奋
参考句型 it is obvious / clear that...
▶It is quite clear that genius is nothing but labor and diligence.
很显然，天才也不过是努力和勤奋而已。
di·plo·ma [dɪˈpləʊmə] ........................CET6 考研 IELTS
名 文凭；毕业证书
参考句型 I wish...
▶I wish he could work hard enough to get his history diploma this year.
我希望他能够勤奋学习，今年获得历史学学位证书。
dip·lo·mat [ˈdɪpləmæt] ............................IELTS
名 外交官
参考句型 I am afraid (that)...
▶I am afraid that I am not tactful（机智的）enough to be a good diplomat.
恐怕我没有那么机智，无法成为一名出色的外交官。
dis·ad·van·tage [ˌdɪsədˈvɑ:ntɪdʒ] ................... CET4 CET6 TOEFL
名 缺点；不利
反 advantage 优点
参考句型 unless...
▶You will be put at a disadvantage unless you change your plan immediately（立即）.
除非你马上改变你的计划，否则你将处于不利的地位。
dis·as·ter [dɪˈzɑ:stə(r)] ................CET4 CET6 考研 TOEFL IELTS GRE
名 天灾，灾害
参考句型 how (what / when...)+to do...
▶We can't help asking ourselves what to do after the earthquake disaster.
我们禁不住要扪心自问震灾过后我们该做些什么。
dis·ci·pline [ˈdɪsəplɪn] ............................CET4 CET6 考研 TOEFL IELTS GRE
名 纪律；训练
动 惩戒；训练
参考句型 (not)+...+enough+(...)+to do sth
▶名 The children lack discipline, and they are not old enough to understand the rules of the school.
孩子们很散漫，年龄也不够大，还不懂学校的规定。
▶动 I've disciplined myself to do two hours of exercise each day;that's enough to help keep fit.
我坚持每天运动两个小时，这样足以帮助我保持身体健康。
dis·con·nect [ˌdɪskəˈnekt] ...................TOEFL
动 断绝；打断
参考句型 it is no wonder that...
▶We forgot to pay the bill; it is no wonder that the electricity company has disconnected our electricity.
我们忘了付电费了，难怪会被电力公司断电。
dis·cour·age [dɪsˈkʌrɪdʒ] ............................CET4 CET6 考研 TOEFL
动 阻止；妨碍
参考句型 I don't think / suppose / believe that...
▶I don't think this will discourage him from continuing to have a try.
我不认为这会让他泄气而不敢再继续尝试。
dis·cour·age·ment [dɪsˈkʌrɪdʒmənt] .......................考研 TOEFL
名 失望，气馁
参考句型 it is obvious / clear that...
▶It is obvious that the failure was a great discouragement to him;he lost his heart from then on.
很明显，那次失败很令他失望，他从那时起就灰心丧气了。
dis·guise [dɪsˈgaɪz].........................ET4 CET6 考研 IELTS GRE
名 掩饰
动 乔装，假扮
参考句型 it is a pity (shame / surprise...) that...
▶名 It is a surprise that no one should recognize her when she was in the disguise of a maid.
当她假扮成一名侍女的时候居然没人认出她，这真令人吃惊。
▶动 It is a surprise that he should be disguised as a peasant（农民） this time．他这次竟假扮成了一个农民，真令人惊讶。
dis·gust [dɪsˈgʌst] .........................CET4 CET6 考研 TOEFL IELTS GRE
名 厌恶
动 使厌恶
参考句型 isn't (don't / can't / won't...)+sb...?
▶名 Didn't you see she turns away in disgust? What on earth did you say？你没看到她厌恶地别过脸去了吗？你到底说了什么？
▶动 Don't some of his ideas disgust us? I think they are so terrible.
难道他的一些想法不让我们反感吗？我觉得它们很糟糕。
dis·miss [dɪsˈmɪs] .....................CET4 CET6 考研 TOEFL IELTS
动 摒除；解散
参考句型 let's / let us...
▶Let us dismiss the topic and talk of something interesting（有趣的）.
我们别考虑这件事了，说点有趣的吧。
dis·or·der [dɪsˈɔ:də(r)] .......................... CET4 CET6 考研 IELTS
名 无秩序
动 使混乱
参考句型 it is / was...that / who...
▶名 It was she who discovered the room in disorder first after work.
下班后是她第一个发现房间里乱糟糟的。
▶动 It is anxiety that may disorder the stomach; don't you know that?
忧虑可能会引起胃部不适，难道你不知道吗？
dis·pute [dɪˈspju:t] .........................CET4 CET6 考研 TOEFL IELTS GRE
名 争论
动 争论
参考句型 let's / let us...
▶名 His honesty is beyond dispute; let's support him.
他的诚实是无可争议的。我们支持他吧。
▶动 Let's dispute the decision; they hope we can give a definite answer in an hour.
咱们来讨论一下这个决定吧，他们希望我们能在一个小时之后给出明确答复。
dis·tinct [dɪˈstɪŋkt] .........................CET4 CET6 考研 TOEFL IELTS GRE
形 个别的；独特的
参考句型 isn't (don't / can't / won't...)+sb...?
▶Don't you think these two ideas are quite distinct from each other?
难道你不觉得这两种观念截然不同吗？
dis·tin·guish [dɪˈstɪŋgwɪʃ] ................CET4 CET6 考研 TOEFL IELTS
动 辨别，分辨，区分
参考句型 it+be动词+adj.+of/for sb+to+v....
▶It is hard for us to distinguish him from his brother, because they are twins.
我们很难区分他和他的哥哥，因为他们是双胞胎。
dis·tin·guished [dɪˈstɪŋgwɪʃt]..........................TOEFL GRE
形 卓越的
参考句型 it+be 动词+not long before...
▶It won't be long before you find that he is distinguished in many different spheres（领域）.
很快你就会发现他在众多领域中都很出众。
dis·trib·ute [dɪˈstrɪbju:t] .........................CET4 CET6 考研 TOEFL IELTS GRE
动 分配，分发
参考句型 why not...?
▶Why not distribute the lands to the peasants（农民）?
为什么不让把土地分给农民？
dis·tri·bu·tion [ˌdɪstrɪˈbju:ʃn] ................ CET4 CET6 TOEFL
名 分配；配给
参考句型 it is obvious / clear that...
▶It is obvious that they don't agree with his opinion about the distribution of income and wealth.
显然他们不同意他关于收入和财富分配问题的看法。
dis·trict [ˈdɪstrɪkt] .........................CET4 CET6 考研 TOEFL GRE
名 区域
同 region 区域
参考句型 the+比较级， the+比较级
▶The longer you live here with your family, the more familiar you will get with the district.
你和你的家人在这住得越长，你们就会越熟悉这个区。
dis·turb [dɪˈstɜ:b] .......................CET4 CET6 考研 TOEFL IELTS
动 使骚动，使不安
同 annoy 惹恼；打扰
参考句型 it is obvious / clear that...
▶It is quite clear that he didn't want to disturb his father at night.
很显然他不想在晚上打扰他的父亲。
di·vine [dɪˈvaɪn] ................CET6 考研 IELTS GRE
动 占卜；预言
参考句型 it is no wonder that...
▶It is no wonder that her husband dosen't believe that astrologers （占星家） are able to divine.
难怪她的丈夫不相信占星家能作预言。
di·vorce [dɪˈvɔ:s] ......................CET4 CET6 考研 TOEFL
名 离婚，解除婚约
动 使离婚；离婚
参考句型 it takes (sb)+一段时间+to+v. ...
▶名 It took their daughter several years to understand the true cause of their divorce.
他们的女儿花了好几年的时间才明白他们离婚的真正原因。
▶动 It took my aunt a long time to decide to divorce her husband.
我婶婶花了很长时间才决定跟她的丈夫离婚。
dom·i·nant [ˈdɒmɪnənt] ......................CET6 考研 TOEFL IELTS GRE
形 高耸的；支配的
参考句型 will / would you (please)...?
▶Will you tell me why they built the castle in the dominant position above the town?
你能告诉我他们为什么要把这座城堡建在市镇中的高处呢？
dom·i·nate [ˈdɒmɪneɪt] ..........................CET4 CET6 考研 IELTS GRE
动 支配，统治
参考句型 what do you think of / about...?
▶A great man can dominate others by force of character; what do you think about that？伟人能以人格的力量支配他人，你觉得呢？
dor·mi·to·ry/dorm [ˈdɔ:mətrɪ]/[dɔ:m] ...................... CET4 CET6 TOEFL
名 宿舍
参考句型 it takes (sb)+一段时间+to+v. ...
▶It takes me half an hour to get to my dormitory from the library.
从图书馆到我的宿舍要花半个小时。
down·load [ˈdaʊnləʊd] ...................... CET4 CET6 考研 IELTS
动 下载；往下传送
参考句型 not only...but also...
▶From the Internet, you can download not only e-books（电子书）but also movies．你不但能从互联网上下载电子书，而且还能从那上面下载电影。
doze [dəʊz] ......................考研 IELTS GRE
名 打瞌睡
动 打瞌睡
参考句型 or / otherwise...
▶名 I has a quick doze on the train, or I couldn't continue working after the journey.
我在火车上小睡了一会儿，否则旅程结束后我将无法继续工作。
▶动 Don't doze off in the middle of the class, or the teacher will get angry with you．不要在课堂上打瞌睡，否则老师会对你生气的。
draft [drɑ:ft] ..........................CET4 CET6 考研 TOEFL IELTS GRE
名 草稿
动 撰写；草拟
同 sketch 草稿，草拟
参考句型 there is no+名词+(in)+doing...
▶名 There is no point in going over the draft when it hasn't been finished yet．草稿还未完成时就看没多大意义。
▶动 There is no point in drafting the contract now, because they haven't agree all the terms yet.
现在草拟合约毫无意义，因为他们还未同意全部的条款。
dread [dred] .....................CET4 CET6 考研 TOEFL IELTS
名 非常害怕
动 敬畏；恐怖
同 fear 恐怖
参考句型 it is obvious / clear that...
▶名 It is quite clear that most people have a dread of snakes.
很显然，大部分人都怕蛇。
▶动 It is obvious that we all dread to think what will happen next.
显然我们都不敢想下一步会发生什么事情。
drift [drɪft] ...........................CET4 CET6 考研 TOEFL IELTS
名 漂流物
动 漂移
参考句型 not both / all / every...
▶名 Not all people know that the drift of the tide is associated with the moon.
不是所有人都知道潮汐与月亮有关。
▶动 Not all people by the sea notice a tiny fishing boat drifting slowly（缓慢地）along.
不是在海边的所有人都注意到了有一只小小的渔船正在缓缓地漂流。
drill [drɪl] ...................CET4 CET6 考研 TOEFL IELTS GRE
名 钻头；演习
动 钻孔
参考句型 would you like...?
▶名 We will hold a fire drill this morning. Would you like to come?
今天上午我们将进行一次消防演习，你要来参加吗？
▶动 Would you like me to ask some workmen（工人）to drill in the wall?
要不要我叫些工人在墙上钻孔呢？
du·ra·ble [ˈdjʊərəbl] ................CET4 CET6 考研 TOEFL IELTS
形 耐穿的；耐磨的
参考句型 it is no+名词+(in)+doing...
▶It is no use in buying bags of this material; you'd better buy some canvas（帆布）bags which are durable instead.
买这种材料的袋子没用，你最好还是买一些耐用的帆布袋子。
dust·y [ˈdʌstɪ] .................CET4 CET6 考研
形 附着灰尘的
参考句型 I wish...
▶It's windy and dusty here in spring; I wish I could move to another city next year.
这里的春天有风沙，但愿我明年能搬到另外一个城市。
DVD/dig·it·al vid·e·o disk/dig·it·al ver·sa·tile disk [ˈdɪdʒɪtl ˈvɪdɪəʊdɪsk] /[ˈdɪdʒɪtl ˈvɜ:sətaɪl dɪsk] .................. CET4 CET6 考研 GRE
名 数字影碟
参考句型 will / would you (please)...?
▶Will you recommend（推荐）the best DVD player in the store?
你能推荐一下这家店里最好的DVD机吗？
dye [daɪ] ................CET4 CET6 考研 TOEFL
名 染料
动 染，着色
参考句型 will / would you (please)...?
▶名 Turmeric（姜黄）can also be used as a dye. Would you give me some?
姜黄也可以作为一种染料来使用，你能给我一些吗？
▶动 Will you tell me why black can dye over other colors?
你能告诉我为什么黑色能把其他颜色都盖住吗？
dy·nam·ic [daɪˈnæmɪk] ...........................CET4 CET6 考研 TOEFL IELTS GRE
形 动能的；动力的；活跃的
同 energetic 有力的
参考句型 it is / was...that / who...
▶ It is the economic recession（衰退）that caused the dynamic market disappeared．由于经济衰退导致了活跃市场的消失。
dyn·as·ty [ˈdɪnəstɪ] .........................考研 IELTS
名 王朝，朝代
参考句型 no one knows that...
▶No one knows that why this dynasty disappeared suddenly a thousand years ago.
没人知道这个王朝为何会在一千年前突然消失。