The writer observes that survival is a difficult endeavor and that the world can sometimes seem harshly hostile.

作者发现，人类需要通过努力而生存,但这个世界往往是非常残酷的。

耶鲁公开课 - 旧约导论课程节选

Now, in other cases you might want to introduce a gene that's not even normally present in people.

但另外一些情况还需要导入,人类细胞中原来没有的基因

耶鲁公开课 - 生物医学工程探索课程节选

Second, we take it very seriously that we need to translate the work we do to humans.

第二，我们是经过慎重考虑的,我们需要将试验的结果应用于人类。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

People need fat, and they need sugar, and they need variety--at least what their brain thinks.

人类需要脂肪和糖类,需要各种物质,至少大脑是这么认为的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

That you could explain human psychology without mental notions like desires and goals.

二，并不需要诸如欲望目标等概念,来解释人类的心理学现象。

耶鲁公开课 - 心理学导论课程节选

And just as there are innumerable human activities which require undistorted references if they are to be satisfied, so there are innumerable other human activities not less important which equally require distorted references or, more plainly, fictions.

就像无数的人类活动,需要真实的证据,如果要达到令人满意的效果，无数同等重要的,人类活动,也同样需要失真的参考,说得更明白点，就是需要虚构。

耶鲁公开课 - 文学理论导论课程节选

He feels like it sort of takes away his innocence as a filmmaker. Then also in the reading, he mentioned that he doesn't believe that you need any film knowledge to make a good movie. You just need an understanding of culture and of human history.

他感觉那样有如夺走了他作为一个电影制作者,所需要的纯真，在阅读材料中，他还提到,他认为要拍一部出色的电影,其实并不需要任何专业知识,只要对文化和人类历史有所了解就可以。

麻省理工公开课 - 电影哲学课程节选

Why don't bacteria need a distinct nucleus and that's necessary in a human cell?

为什么细菌不需要单独的细胞核,而对人类细胞则为必需

耶鲁公开课 - 生物医学工程探索课程节选

The other thing about it is that you could make lots of things that are new but generally you think of engineers as making things that are not just new but they're useful, that they do something that needs to be done, and that they do something that improves life, the quality of life of people.

另一个区别是,科学家会做很多很多新鲜玩意儿,而一般来讲,工程师做的东西不只是新奇,它们还很有用,他们做那些需要做的东西,他们做的东西能够提高,人类的生活水平和生活质量

耶鲁公开课 - 生物医学工程探索课程节选