theirs

theirs
possessive pronoun
  1. used to refer to a thing or things belonging to or associated with two or more people or things previously mentioned
    他们的(所有物),属于他们的(东西);它们的
    they think everything is theirs.
    他们认为每件东西都是他们的。
    a favourite game of theirs.
    他们最喜爱的一种游戏。
语源
  1. Middle English: from their + -'s
用法
  1. There is no need for an apostrophe: the spelling should be theirs not their's
英语宝典
考试词汇表