"There should be no question whatsoever as to whether the United States actively supports these essential goals of the Iranian people,".

VOA: standard.2009.10.28

Further, the nucleus is assumed to be the seat of the essential part of the mass of the atom, and to have linear dimensions exceedingly small compared with the linear dimensions of the whole atom."

进一步的，核被认为是,原子主要质量所在的地方，和整个原子线性尺度相比,核具有很好的线性尺度“

麻省理工公开课 - 固态化学导论课程节选

Here, as elsewhere in Yeats' poetry, it's not essential for you to be able to pursue his occult learning and decode his symbols in order to read his poetry.

这首诗还有他的其他诗里，研究他的神秘主义学习,和解释这些象征对读他的诗,来说不是很重要。

耶鲁公开课 - 现代诗歌课程节选

Because it's absolutely essential that the political side should be going which is to create counter-balance against Baitullah Mehsud."

VOA: standard.2009.06.18

The argument from essential properties which will be introduced to you later.

一会儿将给你们介绍,源于基本属性的论证。

耶鲁公开课 - 死亡课程节选

Byrs says the needs are many. She says money from the appeal will be used to provide some of the most essential services.

VOA: standard.2009.06.21

The primacy of reason and the pursuit of objectivity, therefore, both characteristic of the Western experience seem to me to be essential for the achievement of the desired goals almost anywhere in the world.

理性至上和追求客观,这是西方经验的两个特征,在我看来,这两点几乎在世界任何地方,对既定目标的实现都是至关重要的

耶鲁公开课 - 古希腊历史简介课程节选

House Speaker Nancy Pelosi says she believes it is essential that a government-sponsored public option be part of any bill, if it is to be passed by the House.

VOA: standard.2009.09.09

Everyone agrees that the epic similes in Paradise Lost are different from the epic similes in any other epic poem, and everyone agrees - I'm just going to be presenting to you a sense of critical consensus here - everyone agrees that the similes are in some way absolutely essential to an understanding of this remarkable poem.

大家都同意中的诗意明喻,是和其他诗中的有所不同的，这是共识,-我将要向大家说明这一点,关于这点大家有决定性的共识,-大家都同意这些明喻某种程度上对于,理解这种异常卓越的诗是必然很重要的。

耶鲁公开课 - 弥尔顿课程节选

"I have asked the members of the inquiry that the final report of the inquiry will be able to disclose all but the most sensitive information, that is,all information except that which is essential to our national security,"

VOA: standard.2009.06.15