Today the Internet already became each domain and the daily life essential means of communication.

今天互联网已经成为国民经济各个领域和日常生活不可缺少的通信手段。

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A rich and varied cultural life is essential for this couple.

丰富多彩的、多样化的文化生活对于这对夫妇而言是必不可少的。

《柯林斯英汉双解大词典》

Perhaps struggle unfolds first, not at an economic or social level, but over the appropriation of air, essential to life itself.

也许首先展开的不是在经济或社会层面上的斗争，而是为占有对生命本身必不可少的空气而斗争。

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"Big ears, big old jug ears like that." Pett says,cartoonists are essential to showing the lighter side of life, especially in difficult times.

VOA: standard.2010.03.20

These proteins have functions that are essential for life of the cell, they transport molecules back and forth across the membrane.

这些蛋白所起的功能,对于细胞生存至关重要,它们负责转运分子通过细胞膜进出细胞

耶鲁公开课 - 生物医学工程探索课程节选

For the Greeks,on the other hand as I've said, political society was essential for living any kind of a good life.

对于希腊人,就像我说的另外一方面,对他们而言,政治社会,是人们获得幸福生活的关键

耶鲁公开课 - 古希腊历史简介课程节选

However, it was my absolute certainty that life insurance was essential that motivated him.

WSJ: In a Marriage, One Person Sometimes Needs to Take Charge

Literacy is crucial to the acquisition of essential life skills that enables us to address the challenges we face in life.

UNESCO: OFFICE IN PHNOM PENH

Our calendars hung on the wall next to the phone, and Post-It notes, time-manager notebooks, and PDAs were our essential life tools.

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