A firewall provides an essential security blanket for your computer network.

防火墙为计算机网络提供了基本安全保障。

《牛津词典》

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》

A ceasefire is an essential precondition for negotiation.

停火是谈判的必要前提。

《牛津词典》

Secretary of State Hillary Clinton - speaking at a news conference in Monterrey,Mexico - said the civilian component is essential.

VOA: standard.2009.03.26

It can be honed but those are some of the skills for a consumer internet company and one that is growing this quickly that is just essential.

是可以通过磨练而得的,但是对于增长如此迅速的,客户导向型互联网公司来说,有一些技能是不可习得的。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

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

In addition to the one over licensing fees and a case in Germany involving standard essential patents, Google has maintained legal action against Microsoft in the ITC over a patent relating to a wireless peer-to-peer network, which is not a standard essential patent.

BBC: xbox 360

By knocking out a gene essential to the parasite's development, Kappe hopes to create a vaccine against malaria.

FORBES: Chutzpah Science

The dance Illinois courts are doing around these cases is puzzling since tort law in most parts of the country is clear on a few essential elements.

FORBES: Illinois Appeals Courts Stem Tide of Asbestos-Conspiracy Cases