Once man came to be seen as developing in the process of evolution, the idea of a substance which is contained in his essence seemed untenable.

一旦人类被看作是在进化过程中发展起来的，那么“人类是包含在他的本质中的一种物质”的观点似乎就站不住脚了。

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The study of the cultural history of smell is, therefore, in a very real sense, an investigation into the essence of human culture.

因此，对嗅觉文化史的研究，从真正意义上讲，是对人类文化本质的调查。

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Speed was of the essence in a project of this type.

速度在一个这种类型的项目中至关重要。

《柯林斯英汉双解大词典》

"Well,this is critical," "The risk of defeat goes up during this time because you have got, in essence,a political campaign.

VOA: standard.2009.07.31

Many commentators have observed that The change in name accompanies a change in character, a change of essence in Israel.

许多评论家发现,名字的改变也伴随着性格的改变，以色列本质的改变。

耶鲁公开课 - 旧约导论课程节选

It's an example of a very common tool that's going to be really useful to us, not just for doing search, but for doing a whole range of problems. That is, in essence, the template the describes a log style algorithm.

不仅仅是做搜索,还可以解决一整类问题,本质上，这个模板就描述了,对数形的算法,我们一会再回来。

麻省理工公开课 - 计算机科学及编程导论课程节选

Apigee Insights is a recognition in essence, that a fourth tier must be introduced into applications in addition to UI, Server, and Database.

FORBES: Implications for CIOs and CTOs

Institutions may be loth to invest in a fund that is, in essence, a one-man show.

ECONOMIST: Hedge funds

Researchers say it could help heart failure patients with a "conduction delay" -- in essence, a faulty electrical system in the heart.

CNN: Pacemakers found to help heart failure patients