羊自古以来是人类的忠实伴侣和不可或缺的生活来源。

Sheep is the faithful companion of human and an indispensable source of life.

youdao

公关公司运营的基本构成：业务，团队，制度，和不可或缺的…企业文化。

The main components of agency management: business, people, system, and very importantly, culture.

youdao

想想那些让你感兴趣的和提升自我价值的领域。然后勇往直前，强调自己是团队中不可或缺的一部分。

Think about areas that interest you and where you can add value. Then go ahead and pitch yourself as an integral part of the team.

youdao

In fact, he goes so far as to say that justice is the most sacred part and the most incomparably binding part of morality.

实际上，他甚至声称,公正，是道德中最神圣,和最不可或缺的部分。

耶鲁公开课 - 公正课程节选

All of these three things, in my judgment, are necessary to understand how the polis came into being, how it came to be what it was, and how it came to fulfill and believe in these ideas that I have just been telling you about.

所有这三个事情,在我看来,对于了解城邦是如何产生,如何成型,以及如何实现,和验证那些我刚刚,告诉你们的理念,是不可或缺的

耶鲁公开课 - 古希腊历史简介课程节选