theirsKK [ˋðɛrz] /ˈðɛɹz/代名詞1他們的、她們的、它們的Our house is smaller than theirs, but the garden is bigger.我們的房子比他們的小,但花園比較大。2他們的用於 of 之後I ran into an old classmate of theirs at the station.我在車站遇到他們的一位老同學。3那個人的、他的、她的性別中立單數Someone left a phone here; I think it's theirs.有人把手機留在這裡,我想那是那個人的。