indispensable

Compared meaning: extremely important and necessary (adjective).

比较义项：对生命、健康或成功等而言至关重要、不可或缺的（形容词）。

• vital

  Vital stresses that something is essential to life, health, or a critical outcome; it has a strong, almost life-or-death tone and typically pairs with health, survival, or success.

  vital强调某事物对生命、健康或至关重要的结果而言是必不可少的；语气强烈，几乎带有生死攸关的意味，常与健康、生存或成功搭配使用。

  Regular exercise is vital for keeping your heart healthy.

  定期锻炼对保持心脏健康至关重要。

• indispensable 本词

  Indispensable stresses that something or someone is so useful that you cannot manage without it; it is more neutral and formal, typically describing tools, resources, or people in a practical role.

  indispensable强调某人或某物非常有用，以至于让人无法离开它；语气更中性、更正式，通常用来描述工具、资源或在实际工作中发挥作用的人。

  A reliable translator app is indispensable when you travel abroad.

  一款可靠的翻译应用程序在你出国旅行时是不可或缺的。

Vital and indispensable both mean extremely important and necessary. Vital is stronger, stressing that something is essential to life, health, or success. Indispensable is more neutral and formal, stressing that something or someone is so useful you cannot manage without it, often tools or people.

这两个词在此义项上都表示“非常重要、不可缺少”，但语气和搭配不同：vital 语气更强烈，常与健康、生存、成功等抽象结果搭配；indispensable 语气更客观、正式，常用来形容工具、资源或发挥实际作用的人。