They are priceless, unique and irreplaceable.

它们是无价的、独一无二的，不可替代的。

《柯林斯英汉双解大词典》

They know a cohesive team composed of great communicators plays an irreplaceable role in enhancing the operational efficiency and productivity of an enterprise.

他们知道一个由优秀的沟通者组成的有凝聚力的团队对于提高企业的运营效率和生产力有着不可替代的作用。

youdao

So the real question is how critical those other phases of sleep are. Do they yield any irreplaceable benefits?

所以真正重要的是其他睡眠阶段是否有不可替代的作用？

youdao

There are two kinds of computer owners: those that backup their data, and those who will backup after they lose something irreplaceable.

ENGADGET

What is most important to remember is that while a coach may excel at any number of these traits, history has shown that they certainly are not irreplaceable.

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Many of the services the environment provides, like clean water and air, are irreplaceable necessities, they point out.

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