A good dictionary is indispensable for learning a foreign language.

一本好词典是学习外语必备的。

《牛津词典》

Such insight is indispensable.

这种见解是必不可少的。

youdao

And no banker is indispensable.

也没有哪个银行家是不可或缺的。

youdao

He said people often say that nobody is indispensable.

VOA: standard.2010.04.10

"I do not believe we ought to add troops in Afghanistan unless it is indispensable in our war against al-Qaida, "If it is, then we have to do whatever it takes because al-Qaida is out to annihilate us.

VOA: standard.2009.11.23

Certainly it's a thing we've come to feel is indispensable to our collective buoyancy.

CNN: Our romance with debt -- we'll pay later

Such information is indispensable and collected with many means that are not available to U.N. inspectors.

CNN: SHARE THIS

The moral is that none of us should forget the old truism that nobody is indispensable.

FORBES: To Lead, Go on a Long Vacation