Theirs had been a happy and satisfactory marriage.
他們的婚姻曾經一直幸福美滿。
Our children go to the same school as theirs.
我們的孩子和他們的孩子上同一所學校。
It's a favourite game of theirs.
這是他們最喜愛的游戲。
It was a neighbourly gesture of theirs.
這是他們友好的表示。
There was a big group of a dozen people at the table next to theirs
他們旁邊的桌上坐了一大群人，有十幾個。