The Songhua River system is the vital principle to the economy of Heilongjiang province.

松花江水系是黑龙江省的经济命脉。

youdao

The vital principle or animating force in living beings; incorporeal consciousness; supernatural being.

所有生物，重大的原理或者有生气的力量：灵魂的意识；超自然存在。

youdao

It was a strange opposition, of the like of which she had never dreamed — an opposition in which the vital principle of one was a thing of contempt to the other.

这是一个奇怪的对立。像这样的对立是她从来做梦都没有梦到的- - -这个对立，在一方最重要的原则却是对方完全蔑视的东西。

youdao

Solidarity - a vital principle then and just as vital a principle now.

BBC: News | UK Politics | Donald Dewar's speech

"There is a vital principle at stake here, " he added.

BBC: Labour urges temporary jobs for long-term unemployed

This is the core principle of universities: the pursuit and free exchange of ideas is vital and uplifting, and efforts that seek to impose a particular viewpoint to the exclusion of others should be fiercely resisted.

FORBES: How academic orthodoxy is enforced: a valuable lesson from a distinguished Pharmascold