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announcement
n.公告；宣布
The announcement of the name of the winner will be made at three o'clock.
这次得奖人的名单将于3点钟发布。
The politician made a formal announcement that he would resign early next year.
这名政治人物正式宣告明年初他将辞职。
theory
n.学说；理论
Many scientists believe the theory that the universe is getting larger.
很多科学家相信宇宙正在变大的这个说法。
Developing a theory and proving it are very different things.
研发一套理论和加以证实是两码事。
Well, that sounds good in theory, but I don't know if it will work in practice.
嗯，那在理论上听起来不错，但我不知道它实际上是否可行。
relate
vt.使相关；叙述 w.和……有关（皆与介词to并用）
Spanish and French are related to Latin.
西班牙文及法文与拉丁文有渊源。
Grandfather related (to us) a story from his childhood.
祖父（向我们）叙述一个他小时候的故事。
That news relates to the problem we were just discussing.
那个消息和我们刚才讨论的问题有关。
skate
n.溜冰鞋 vi.溜冰
I've worn out these skates. I want to buy a new pair.
这双溜冰鞋我穿坏了，我要买一双新的。
Would you like to join us in going skating this weekend?
这个周末你要不要跟我们溜冰去？
ski
n.滑雪板 vi.滑雪
That store specializes in imported skis.
那家店专卖进口的滑雪板。
Where will you go skiing this winter?
今年冬天你要到哪儿去滑雪？
latter
a.后者的 pron.后者（之前置 the)
The resume of the latter interviewee was quite impressive.
后一位面试者的履历令人印象深刻。
John and Peter are both my friends. The former is a teacher, while the latter is a soldier.
约翰和彼得都是我的朋友。前者是老师，后者则是军人。
structure
n.结构；建筑物
The structure of the poem is very complicated.
这首诗的结构很复杂。
The monument is a famous structure in town.
这座纪念碑是镇上有名的建筑。
staff
n.职员；幕僚（集合名词，不可数）
Our company has a staff of 500, working in both Canada and Taiwan.
我们公司有500名员工,分别在加拿大与台湾工作。
crew
n.(船上或飞机上的）全体工作人员（集合名词，不可数)
We have twenty crews on our ship. (X) We have a crew of twenty on our ship. =We have twenty crew members on our ship.
我们船上一共有20位工作人员。
suffer
vt.遭受 受苦
That company suffered a big loss because of poor management.
那家公司由于管理不善蒙受重大损失。
My father suffers from diabetes.
我爸爸患有糖尿病。
