She was becoming indispensable to him.

对他来说她正变得不可或缺。

《柯林斯英汉双解大词典》

She made herself indispensable to the department.

她成为这个部门不可缺少的一分子。

《牛津词典》

Idleness is not just a vacation, an indulgence or a vice; it is as indispensable to the brain as Vitamin D is to the body.

懒惰不仅仅是度假、放纵或恶习；它对于大脑就像维生素 D 对身体一样不可或缺。

youdao

"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

Like any major route, the canal played several roles, all of them indispensable to the empire.

BBC: Beijing��s extraordinary Grand Canal

The combination of work-rate and basic technique make Sorin indispensable to Argentina's World Cup quest.

BBC: Sorin soars to fresh fields

Organizations operating in this way find that engaged employees are indispensable to achieving their goals.

FORBES: Is The Goal Of A Corporation To Make Money?