/ðeəz/ pron.1.(of them, belonging to them)他们的；她们的；它们的
Both countries believe the territory is rightfully theirs.两国都认为这理应是他们的领土。
Your priorities may not be the same as theirs.你的重点可能和他们的不一样。
Whose car is that?—It's theirs.那是谁的车？——他们的。
Theirs had been a very happy marriage.那时他们的婚姻很美满。
of theirs他们的
a friend of theirs他们的一位朋友
2.(his or hers)(用于代指前文不确定的先行词one、whoever、anybody等)他的, 她的, 它的
I don't know whose laptop it is. Somebody must have left theirs.我不知道这是谁的笔记本电脑, 准是有人落下的。