their
- det.他们的;她们的;它们的;在提及性别不详的人时，用以代替his或her
theirdet.
他们的；她们的；它们的
of or belonging to them
Their parties are always fun.
他们的聚会总是乐趣横生。
Which is their house?
哪座房子是他们的？
（在提及性别不详的人时，用以代替his或her）
used instead of his or her to refer to a person whose sex is not mentioned or not known
If anyone calls, ask for their number so I can call them back.
如有人打电话来，问问电话号码，这样我可以回电话。
their
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DET-POSS 他们的;她们的;它们的
You use their to indicate that something belongs or relates to the group of people, animals, or things that you are talking about.Janis and Kurt have announced their engagement...
贾尼斯和库尔特已宣布订婚。
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DET-POSS (代替 his or her，而不指明是男是女;有人认为这种用法不对)
You use their instead of 'his or her' to indicate that something belongs or relates to a person without saying whether that person is a man or a woman. Some people think this use is incorrect.Every member will receive their own 'Welcome to Labour' brochure.
每个党员都将收到一本名为《欢迎加入工党》的小册子。
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注意不要混淆 their 和 there。
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Their success is due in large part to their determination .
他们的成功在很大程度上应归功于他们的决心。
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It was time to put their suggestion into practice .
那时就该把他们的建议付诸实施了。
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No one in their right mind would choose to work there .
任何一个精神正常的人都不会选择去那里工作。
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Their family has always been well thought of around here .
他们家在这一带一直颇受敬重。
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Make sure you get a good look at their faces .
你一定要仔细看清他们的面孔。
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This gives the design team a sound basis for their work .
这为设计组开展工作提供了坚实的基础。
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Many people don 't use their computers to their full potential .
很多人没有充分利用他们计算机的全部潜在功能。
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The course allows students to progress at their own speed .
本课程允许学生按各自的速度学习。
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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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Most people said that pay was their main motivation for working .
大多数人说赚取报酬是他们工作的主要动机。
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They have increased their share of the market by 10 % .
他们将其所占的市场份额增加了10%。
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Their foreign policy is based on the principle that ' might is right ' .
他们的外交政策遵循“强权即公理”的原则。
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We encourage all students to work at their own pace .
我们鼓励学生都按自己的节奏学习。
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What is their main source of income ?
他们的主要收入来源是什么？
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I 'm not in a position to query their decision .
我无权怀疑他们的决定。
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Their background gives them little chance of achieving at school .
他们的家庭背景使他们很难有机会在学校学有所成。
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I think this is their house , but I 'm not sure .
我想这是他们家，但不敢肯定。
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I found this information on their website .
我在他们的网站上发现了这一信息。
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They could not achieve their target of less than 3 % inflation .
他们未能达到通货膨胀低于3%的目标。
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Our children are grown up and have children of their own .
我们的子女都已长大成人，有了自己的孩子。
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Everywhere people were going about their daily business .
无论哪里人们都在忙着干日常工作。
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Both their children are at university .
他们的两个孩子都在上大学。
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Their visit put us to a lot of expense .
他们的来访使我们破费不小。
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They haven 't set a date for their wedding yet .
他们还没有确定婚期。
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The TV is always on in their house .
他们家的电视总是开着。
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The land is used by local people to graze their animals .
这块地当地人用来放牧。
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The college 's aim is to help students achieve their aspirations .
大学的目标是帮助学生实现他们的抱负。
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What time do the kids have their tea ?
孩子们什么时候用傍晚主餐？
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We can finish this job on time if everyone does their bit .
要是每个人都尽职，我们就能按时完成这项工作。
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They are fighting to save what is left of their business .
他们在拼命抢救他们仅余的业务。