4004.due(形)到期的
Most of the problems were due to human error.
多数问题都是人为错误造成的。

4005.dull(形)迟钝的；单调的
同义词blunt
Life in a small town could be deadly dull．
小城镇的生活可能会非常没意思。

4006.dumb(形)哑的；愚笨的(名)哑巴
(形):We all sat there in dumb silence.
我们都惊讶得说不出话来了。
(名):She was born deaf and dumb.
她天生又聋又哑。

4007.dumpling(名)水饺
I'll invite you to eat dumpling next time if you like.
如果您愿意，下次我请您吃饺子。

4008.duty-free(形)免税的
We bought a load of duty-free goods at the airport.
我们在机场买了许多免税商品。

4009.DVD(名)数码影音光碟
digital vidio disk的缩写
I enjoy watching DVD better than watching TV.
比起看电视，我更喜欢看DVD。

4010.earnest(形)认真的
同义词devoted
She is earnest in her work.
她工作很认真。

4011.earnings(名)收入、工资
惯用复数
He soon spent all his earnings．
他不久就把所赚得的钱全花光了。

4012.earnestly(副)认真地
The work on the house will begin earnestly on Monday．
这栋房子的修建工作将在星期一正式开始。

4013.ease(动)减轻(名)容易
(动): The government is doing its best to ease the tension in that area.
政府正在竭尽全力来缓和那个地区的紧张局势。
(名):Their team won the game with ease.
他们队轻松地赢了那场比赛。

4014.Easter(名)复活节
Today is Easter.
今天是复活节。

4015.eastern(形)东方的
In the eastern part of the Unitad Statas，summer tamperatures are very differenrt from winter temperatures．
在美国东部，夏天的温度和冬天的温度很不相同。

4016.echo(动)引起共鸣(名)回音、回声、回响
(动): The gunshot echoed through the forest.
枪炮声在林中回荡。
(名): There was an echo on the line and I couldn't hear clearly.
电话里有回音，我听不清楚。

4017.ecology(名)生态
Oil poiiution could damage the ecology of the coral reefs.
石油污染可能破坏珊瑚礁的生态环境。

4018.economic(形)经济的、经济上的
They bought an old house for economic reasons.
出于经济上的原因他们买了一间旧房子。

4019.economical(形)节俭的、经济的
As is generally accepted,econamical growth is determined by the smooth development of production.
正如普遍认为的那样，经济增长是由生产的稳定发展决定的。

4020.economically(副)经济上地；节约地
The factory is no longer economically viable.
这个工厂已没有经济效益了。

4021.economics(名)经济
惯用复数
The third world economics are not optimistic.
第三世界国家的经济状况并不乐观。

4022.economist(名)经济学家
Some economists strongly believe in private enterprise.
有些经济学家非常赞成私营企业。

4023.economy(名)经济、节约
Foreign disinvestment and the exclusion of South Africa from world capital markets after 1985 further weakened its economy.
国外撤资以及被排斥在世界资金市场之外削弱了1985年以后的南非经济。

4024.edge(名)边缘
Don't put that glass so near the edge of the table.
别把那个玻璃杯放在离桌边太近的地方。

4025.edible(形)可食用的
The food at the hotel was barely edibie.
这家旅馆的食物简直不能入口。

4026.editorial(名)社论(形)编辑的；主管的
(名):John writes editorials for the newspaper．
约鞠为这家报社撰写社论。
(形):Mandy expanded her editorial staff.
曼蒂扩大了她的编辑部。

4027.educate(动)教育、教导
Some schools teach,but fail to educate their students.
有些学校只会教书而不会育人。

4028.educated(形)受过教育的
He's a Princeton-educated Texan．
他是受过普林斯顿大学教育的德克萨斯人。

4029.education(名)教育
There should be closer links between education and industry.
教育界与产业界之间应该有更紧密的联系。

4030.educational(形)教育的、有教育意义的
Watching television can be very educational.
看电视可以使人受到很多教益。

4031.educator(名)教育家、教育工作者
Her precursor as school principal was an aminent educator.
她在担任校长前是一位卓越的教育家。

4032.eel(名)鳗鱼
He that will catch eel must disturb the flood.
混水摸鱼。

4033.effect(名)影响、结果、作用
Modern farming methods can have an adverse effect on the environment.
现代农业耕作方法可能对环境造成负面影响。

4034.effective(形)有效的
Long prison sentences can be a very effective deterrent for offenders.
判处长期徒刑可对违法者起到强而有力的威慑作用。