复数： indispensables

Only saudi arabia 's output will be indispensable .

只有沙特阿拉伯的石油产出将不可或缺。

Cars have become an indispensable part of our lives .

汽车已成了我们生活中必不可少的一部份.

Obama is indispensable to the new doctrine .

奥巴马是新主义不可缺少的人物。

The more intimate the relationship , the more indispensable it becomes .

这种联系越活跃，就越是必不可少。

Since then , it has become an expedient but far from indispensable tactic .

不过开始之后，非暴力不再是必要策略，而是变成了权宜之计。