4872.menace(名)威胁
These weapons are a menace to world peace.
这些武器就是对世界和平的威胁。

4873.meaningful(形)有意义的、意味深长的
同义词significant
She gave ma a meaningful look．
她意味深长地看了我一眼。

4874.meaningless(形)无意义的
We fill up our lives with meaningless tasks.
我们终日忙忙碌碌，过得毫无意义。

4875.meanwhile(副)同时、期间、令一方面
The doctor will see you again next week.Meanwhile, you must rest as much as possible.
医生下周还会替你看病。在此期间，你一定要尽可能多休息。

4876.measure(动)测量；改正(名)量度法；标准
(动): He's gone to be measured for a new suit.
他去量尺寸做新衣服去了。
(名): We must take preventive measures to reduce crime in the area．
我们必须采取预防措施来减少这个地区的犯罪。

4877.maasurement(名)测量
Accurate measurement is very important in science．
在科学领域，精确的测量非常重要。

4878.mechanic(名)技工、修理工
There is not a mechanic who hasn't had this problem.
没有一个修理工不碰到这样的问题。

4879.mechanical(形)机械的
Tte break down was due to a mechanical failure．
抛锚是机械故障造成的。

4880.mechanics(名)机械、力学
I know something about mechanics．
我懂一点力学。

4881.mechanism(名)机械装置；技巧
The watch made in Switzerland works well and the mechanism rarely fails.
这只瑞士生产的表很好，它的装置很少出毛病。

4882.medal(名)奖牌、奖章、纪念章
Every medal has its reverse.
每一枚勋章都有正反两面。

4883.meddle(动)干涉
后接介词in
He had no right to meddle in her affairs.
他无权干涉她的事情。

4884.medication(名)药物治疗
Many flu medications are available without a prescription.
许多感冒药不用处方就可以买到。

4885.medieval(形)中世纪的、中古的
He doesn't like studying medieval history.
他不喜欢学习中古历史。

4886.meditation(名)冥想、沉思
The event made all the players fall into meditation.
这个事件使所有的队员陷入深思。

4887.medium(名)中间、媒介；手段、工具
Because of its intimacy, radio is usually more than just a medium;It is company.
收音机可随身携带，所以它不只是一个收听工具，它还可以与人做伴。

4888.meek(形)温和的、温顺的
They called her Miss Mause because she was so meek and mild．
他们称她为”鼠小姐”，因为她总是那么懦弱谦和。

4889.melody(名)旋律、歌曲
He played an old melody.
他演奏了一支古老的歌曲。

4890.melt(动)融化、软化
Her trusting smile melted his heart．
她那信任的微笑融化了他的心。

4891.memorize(动)背诵、记忆
Do you memorize the time that he arrives?
你记得他到达的时间吗？

4892.memory(名)记忆
People have short memories.
人们是健忘的。

4893.mand(动)修补；改善；愈合
Young McDonald had better mend his way, or he is going to end up in prison．
小麦克唐纳最好改过自新，否则下场就是进监狱。

4894.mantal(形)心理的、精神的
同义词psychical
Do you have a mental picture of what it will look like?
在你脑子里它会是什么样子？

4895.mention(动)(名)提及
(动): Nobody mentioned anything to me about it.
没人跟我提过这事。
(名):He made no mention of her work．
他根本没提到她的工作。

4896.mentor(名)良师、导师
He fed on the great ideas of her mentor.
他以他导师的伟大思想为支撑。

4897.merchandise(名)商品
Ticketed the new merchandise．
为那个新产品贴上标签。

4898.merchant(名)商人
Venice was once a city of rich merchants.
威尼斯曾是富商云集的城市。

4899.mercy(名)慈悲；救济
The commander showed mercy to the prisoners.
司令官对囚犯十分慈悲。

4900.mere(形)仅仅的
同义词only
It took her a merre 20 minutes to win.
她只不过花了20分钟就赢了。

4901.merely(副)仅仅地
That was merely a guess of mine.
那不过是我的猜测而已。

4902.merit(名)优点、价值、长处
I get the job on merit.
我凭才能得到这份工作。

4903.mess(名)杂乱、混乱
My hair's a real mess!
我的头发太乱了。

4904.messy(形)杂乱的
同义词dirty
The divorce was painful and messy.
那次离婚令人痛苦而又纠葛不清。