例句：

　　She was becoming indispensable to him.

　　對(duì)他來說她正變得不可或缺。

　　She made herself indispensable to the department.

　　她成為這個(gè)部門不可缺少的一分子。

　　Cars have become an indispensable part of our lives.

　　汽車已成了我們生活中必不可少的一部分。