3304.alarming(形)令人忧心的；吓人的
同义词threatening
The rainforests are disappearing at an alarming rate.
雨林正以惊人的速度消失.

3305.alas(感)哎呀
表示悲伤或恐惧等
Alas,for many people,hunger is part of everyday life.
唉，对很多人来说，挨饿是家常便饭。

3306.alert(名)(动)警戒
(名):She is always on the alert．
她总是保持警觉。
(动): Neighbors quickly alerted the emergency services．
邻居很快向紧急情况中心报了警。

3307.alien(名)外星人(形)外国的；不相容的
(名):Do you believe in aliens.
你相信外星人吗？
(形):This effect is utterly alien from the one we have intended．
结果和我们预先的设想大相径庭。

3308.alike(形)相像的(副)相同地
(形):My sister and I do not look alike.
我和我妹妹外貌不相像。
(副): Good health and safety management benefit employers and employees alike．
身体健康和安全管理有益于雇主和雇员。

3309.all-out(形)完全的、尽全力的
All-out war was almost inevitable now．
这时全面性的战争已不可避免。

3310.allow(动)允许
同义词permit
Supporters of the new super systems argue that these mergers will allow for substantial costreductions and better coordinated service.
支持超大铁路集团的人宣称，公司合并有利于大幅度地降低成本，也有利于提供更好的相互协调的服务。

3311.alound(副)大声地
The teachar listened to the children reading alound.
老师听着燕子们大声地朗读。

3312.alphabet(名)字母
The word "alphabet" comes from the first two Greek letters."alphabet"
这个词是源自希腊语的头两个字母。

3313.altar(名)祭坛、圣坛
He was willing to sacrifice his happiness on the altar of fame.
为了名声，他心甘情愿牺牲幸福。

3314.alter(动)改变
同义词vary
l have to alter my design．
我必须修改我的设计。

3315.alternate(动)轮流
Mary and her sister will alternate in setting the table．
玛莉和她妹妹轮流摆放餐桌。

3316.alternative(形)二择一的、替代的
Don't worry! There was another alternative scheme.
别担心！还有另一个替代方案。

3317.although(连)虽然、然而
同义词though
Although he is young，he knows a lot．
尽管他年轻，但知道很多东西。

3318.altogether(副)总共、完全、总而言之
I am not altogether happy about the decision.
我对这个决定并不十分满意。

3319.amateur(形)业余的(名)业余爱好者、业余从事者
(形):Separate journals have now appeared aimed mainly towards either professional or amateur readerahip．
现在不同的杂志分别倾向不同的读者群，专业人士有专业人士的杂志，业余人士有业余人士的杂志。
(名):Amateur have continued to pursue local studies in the old way.
业余人士继续用老办法从事地质研究工作。

3320.amaze(动)使惊讶
后接介词at
I was amazed at the news．
我听到这个消息大吃一惊。

3321.amazement(名)惊讶
不可数
To my amazement，he was able to racite the whole poem from memory.
使我大为惊奇的是，他把这首诗从头到尾背诵了出来。

3322.amazing(形)令人惊讶的、惊人的
同义词marvelous
It's amazing how quickly people adapt.
人适应环境的速度之快真是惊人。

3323.amiable(形)和蔼可亲的
同义词friendly
We have a very amiable companionship.
我们之间存在一种亲切友好的关系。

3324.among(介)在……之间
They strolled among the crowds.
他们在人群中散步。

3325.amount(名)数量、共计、总数
Dactors see a connection between increase amounts of leisure time spent sunbathing and the increased number of skin cancer.
医生注意到在日光中曝晒的时间越多，产生皮肤瘸的病例就越多。

3326.ample(形)丰富的
同义词abundant
This leaves her ample time to prepare three meals a day．
这样她就有充裕的时间准备一日三餐饭.

3327.amuse(动)给……提供娱乐
同义词entertain
The audience was amused by the comedian every now and then.
观众不时被那喜剧演员逗笑了。

3328.ancestor(名)祖先
His ancestors had come te America from lreland.
他的祖先从爱尔兰来到美国。

3329.anew(副)再、重新
They startrad life anew thousands of miles away.
他们在几千英里以外重新开始生活。

3330.anguish(名)苦闷
The new's story told of the mothar's anguish at the death of her daughter.
这则新闻报导叙述了女儿去世带给母亲的痛苦。

3331.ankle(名)脚踝
My right ankle hurts.
我的右脚踝很痛。

3332.anniversary(名)周年纪念
Today is the theatre's 25th anniversary celebrations.
今天是剧院25周年庆祝活动。

3333.announce(动)宣布
He announced the next singer.
他宣布下一位歌手上场。