theirs

1. PRON-POSS You use theirs to indicate that something belongs or relates to the group of people, animals, or things that you are talking about. 他們的; 她們的; 它們的 (東西)

There was a big group of a dozen people at the table next to theirs. 他們旁邊的那張桌坐了一大群人，有十幾個。

2. PRON-POSS You use theirs instead of "his or hers" 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. 用於代替“他的”或“她的”，不指明是男是女，有些人認爲這種用法不正確

He would leave the trailer unlocked. If there was something inside that someone wanted, it would be theirs for the taking. 他不會鎖活動房屋。如果屋裡有別人想要的東西，他們就可以拿走。