That car is theirs.
那辆小汽车是他们的。
Theirs are better.
他们的(东西)更好。
He'll bring his wife if everyone else will bring theirs.
如果别人都带妻子,他就带他的妻子来。
英汉双解词典包含483723条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。