3873.dawn(动)破晓；开始(名)黎明
(动):The space age dawned in the twentieth century.
太空时代始于二十世纪。
(名):My grandfathar wakes up at dawn.
我爷爷在黎明时起床。

3874.daybreak(名)破晓
We left before daybreak.
我们是在黎明前出发的。

3875.daydream(动)做白日梦(名)白日梦
(动):I would spend hours daydreaming aboUt a house of my own.
我常常一连好几个小时都在幻想自己有一栋房子。
(名):She stared out of the window,lost in a daydream.
她凝视窗外，沉浸在幻想之中。

3876.daylight(名)日光
It is easier to read by daylight than by lamplight.
在日光下读书比在灯光下省力。

3877.deadline(名)最后期限、截止日期
I pretar to work to a deadline.
我喜欢按规定的期限完成工作。

3878.deaf(形)聋的
He was deaf to my requests for help.
他对我的求助充耳不闻。

3879.deafen(动)使听不见
The noise of the siren was deafaning her.
汽笛声震得她耳朵都快聋了。

3880.dealer(名)商人
同义词businessman
He's a dealer in sacand-hand cars.
他是个经销二手汽车的商人。

3881.deathbed(名)临终时所卧的床
He told me the truth on his deathbed.
他临终时向我吐露了真情。

3882.debate(动)(名)辩论
(动):The subject was hotly debated.
这个题目曾经被热烈地辩论过。
(名):The fiece debate is going on.
一场辩论正在激烈进行中。

3883.debt(名)债务
I don't want to lend any more money to him;he's already in debt to me.
我不想再借钱绐他了，他已经欠我钱了。

3884.debut(名)首映；首次出版；初次登台
He will make his debut for the first team this week.
本周他将在第一支出场的队伍中首次亮相。

3885.decade(名)十年
Many astrophysicists have been convinced for the better part of a decade that it is true.
许多天体物理家七八年来一直认为这一论说是正确的。

3886.decay(名)腐烂
同义词spoil
The landlord had let the building fall into decay.
房东放任不管，房子破烂不堪。

3887.decisive(形)决定性的、果断的
She has played a decisive role in the peace negotiations．
她在和平协商中起了关键作用。

3888.decidedly(副)明确地
Their relationship is beginning to look decidedly shaky.
他们的关系明显开始动摇。

3889.deck(名)甲板
As the storm began,everyone disappeared bolow deck.
暴风雨来临时，所有的人都躲在甲板下面去了。

3890.decorate(动)装饰
They decorated the room with flowers and balloons．
他们用花和气球装饰了房间。

3891.decoration(名)装饰，装潢
I knew something about decoration.
我对装潢了解不少。

3892.decrease(名)(动)减少
同义词diminish
(名):The decrease in crime is accelerating.
犯罪案件正在加速地减少。
(动):Car sales are decreasing.
汽车销售量下跌。

3893.dedicate(动)使效力于；奉献
后接不定式to
I'd like to dedicate this book to my mother.
我谨以此书献给我的母亲。

3894.dedication(名)致力
He spent a life of dedication.
他奉献了他的一生。

3895.deed(名)行为、功绩
The team achieved new deeds of merit.
那一组又立了新功。

3896. deem(动)认为、视为
The board deemed it urgent that these files should be printed right away.
委员会认为这些档案很紧急，应马上印出来。

3897.defeat(动)打败、击败
The instruction manual completely defeated me．
这操作指南把我完全弄糊涂了。

3898.defect(名)缺点
同义词shortcoming
He thinks he has a lot of defect．
他认为他有很多缺点。

3899.defer(动)延期、顺从
同义词postpone
The department deferred the decision for six months.
这个部门延迟了六个月才做决定。

3900. define(动)解释、给……下定义
We may define a square as a rectangle with four equal sides.
我们可以把正方形定义为四边相等的矩形。

3901.definite(形)明确的、肯定的
There is a definite natationship between inflation and interest rates．
通货膨胀和利率之间有明确的联系。

3902.definitely(副)明确地
l definiteilt remember sending the letter.
我明确地记得发出这封信了。

3903.definition(名)定义
His artistry is beyond definition.
他高超的艺术才能是难以描述的。

3904.degree(名)程度；度数；位；等级
Her job demands a high degree of skill.
她的工作要求有高超的技能。

3905.delete(动)删除
This command deletes files from the directory．
这一指令把档案从目录中删除。