"We think that is an essential first step. We are continuing to call for the freedom of Aung San Suu Kyi.

VOA: standard.2009.11.12

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

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

About 10 percent or 200,000 of the displaced are sheltering in camps, which are providing for their essential needs.

VOA: standard.2009.07.03

Economics and Game Theory are now essential tools for understanding human thought and human behavior— those issues connecting to philosophy, computer science, anthropology, literature, theology, and many, many other domains.

经济学和博弈论如今已经成为了,理解人类思维和人类行为的重要方法,这些问题涉及哲学,计算机科学,人类学,文学,神学,以及许多其他的科学领域

耶鲁公开课 - 心理学导论课程节选

Parents of children with autism say better services and resources for the children are essential.

VOA: standard.2010.08.09