they
- pron.他们;她们;它们;用以代替he或she，指性别不详的人;(泛指)人们，人人，众人;权威人士
theypron.
他们；她们；它们
people, animals or things that have already been mentioned or are easily identified
‘Where are John and Liz?’ ‘They went for a walk.’
“约翰和利兹在哪儿？”“他们去散步了。”
They (= the things you are carrying) go on the bottom shelf.
这些东西放在架子的底层。
（用以代替he或she，指性别不详的人）
used instead of he or she to refer to a person whose sex is not mentioned or not known
If anyone arrives late they'll have to wait outside.
谁要是迟到，他就得在外面等着。
（泛指）人们，人人，众人
people in general
The rest, as they say, is history.
其余的就尽人皆知，不须赘述了。
权威人士；上面（指负责人）；专家
people in authority or experts
They cut my water off.
管事的把水给我掐了。
They now say that red wine is good for you.
现在专家说喝红葡萄酒对人有好处。
they
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PRON-PLURAL 他们;她们;它们
You use they to refer to a group of people, animals, or things.The two men were far more alike than they would ever admit...
那两个人也许不承认，可他们非常相像。
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PRON-PLURAL (用以代替he or she，而不指明是男是女;有人认为这种用法不对)
You use they instead of 'he or she' to refer to a person without saying whether that person is a man or a woman. Some people think this use is incorrect.The teacher is not responsible for the student's success or failure. They are only there to help the student learn...
教师对学生的成败并不负有责任，其职责只是帮助学生学习。
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PRON-PLURAL (用于 they say，they call it 等表达中表示泛指)他们
You use they in expressions such as 'they say' or 'they call it' to refer to people in general when you are making general statements about what people say, think, or do.They say there's plenty of opportunities out there, you just have to look carefully and you'll find them...
他们说，那里机会多的是，你只要仔细找就能发现。
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What in the world did they think they were doing ?
他们到底认为自己在做什么？
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They couldn 't give me any more information .
他们不可能给我提供更多的信息。
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Some people don 't know when they 're well off .
有些人身在福中不知福。
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Things ain 't what they used to be .
现在情况不比从前了。
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They have been working on the perfection of the new model .
他们一直在努力完善新型号。
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When I left they were all still hard at it .
我离开的时候他们都还在努力工作。
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As people get older , they get set in their ways .
随着年龄的增长，人就积习成性。
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They had achieved a lot in a short space of time .
他们在短时间内取得了很大的成绩。
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When they set out they were well prepared .
他们出发时有很充分的准备。
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You can 't stop people from saying what they think .
人们怎么想就会怎么说，你阻止不了。
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They 've been best friends since they were children .
他们从孩提时起就是最要好的朋友。
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The problem with many modern buildings is that they lack personality .
许多现代建筑物的问题在于缺乏特色。
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They are in work .
他们有工作。
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Every week they get together to make music .
每个星期他们都聚在一起唱歌奏乐。
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They both said much the same thing .
他们两人的话大致一样。
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How much are these ? They don 't have a price on them .
这些东西卖多少钱？它们都没有标价。
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They decided to make a break for it that night .
他们决定那天晚上逃跑。
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Where were they made ?
这些是在哪里制造的？
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They took a vote on who should go first .
他们以投票方式决定谁先走。
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They had to draw lots to decide who would go .
他们只得抽签决定谁去。
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They were surprised to find that he 'd already left .
他们惊奇地发现他已经走了。
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I 'll say this for them , they 're a very efficient company .
我要为他们说句公道话，他们公司的效率的确很高。
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I could hear every word they said .
他们说的每句话我都能听见。
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When they get together , all they talk about is football .
他们在一起时，谈论的都是足球。
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People should decrease the amount of fat they eat .
人们应减少脂肪的摄入量。
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I don 't know why they stay together .
我不知道他们为什么还在一起。
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They were promoted to the First Division last season .
上个赛季他们晋升为甲级队。
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They claim to have a 40 % worldwide market share .
他们声称占有全球40%的市场。
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It 's a mistake they almost always make .
这是他们几乎总要犯的错误。
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They are all expert in this field .
他们都是这个领域的行家。