Their is the third person plural possessive determiner. their 是第三人称复数所有格限定词。
- 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。 - Horses were poking their heads over their stall doors.
马儿们从马厩门上探出头来。 - ...as the trees shed their leaves and the year begins to die.
随着树叶凋落,一年将逝
- 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。 - But anyone looking for income from their investments is in a much worse state.
但是,那些指望靠投资获取收入的人境况更为糟糕。
Take care not to confuse their and there.
注意不要混淆 their 和 there。