theirs
pronoun /ðeəz/
/ðerz/
the possessive form of they- of or belonging to them
他们的，她们的，它们的（所有物） - Theirs are the children with very fair hair.
他们的孩子是那些长着满头金发的。 - It's a favourite game of theirs.
这是他们最喜爱的游戏。
词源Middle English: from their + -'s. - Theirs are the children with very fair hair.