The regions that are necessary for describing what the protein is like are called exons, the regions that are not are called introns.

因此我们把编码蛋白质的区域,称为外显子,而把不参与编码蛋白的区域称为内含子

耶鲁公开课 - 生物医学工程探索课程节选

we're looking for something that's true,necessary,interesting and, if not unique to death,at least not true of everything.

我们要寻找的是真实，必要，有趣的，而且就算不是死亡独有，也不能是普遍事实。

耶鲁公开课 - 死亡课程节选

It's not necessary to do that, but it can be quite convenient.

虽然没有必要这样做，但是这样做是很方便的。

麻省理工公开课 - 热力学与动力学课程节选

Eliot was there, in that essay on the metaphysical poets that I'm quoting from, defending as necessary what is the primary characteristic, not only of his own poetry, but really of modern poetry generally, what is often called its difficulty.

艾略特在描写那些抽象派诗人的文章里,就是我引用的那篇，极力维护,诗人的首要特征，不仅是因为他自身的诗性，更因为维护现代诗歌的必要，这是非常困难的一件事。

耶鲁公开课 - 现代诗歌课程节选

Then the duke judged that such excessive authority was not necessary, because he feared it might become hateful and he set up a sort of a civil court in the middle of the province with the most excellent president where each city had its advocate.

然后君王判断,这样过度的威信是不需要的，因为他害怕那可能会变成仇恨,他在该省区中心,设立了一个类民事法庭,并派出最优秀的大臣,让每一座城都有自己的律师。

耶鲁公开课 - 政治哲学导论课程节选

The standard library, that first line of code, it's not strictly necessary but any time you use a function, a tool that someone else wrote that lives in that so called library, you do need that include line as we'll see.

标准库函数--第一行代码，严格来说，不是每次都要写的，但是一旦你调用某个别人写，的函数，而这个函数又恰巧位于标准库里面,你就要像我们看到的这样，把它include进去。

哈佛公开课 - 计算机科学课程节选

One of the forms of processing that happens, that's very important in human gene expression is that some of the sections of the DNA molecule are not really necessary for describing the protein.

在人类的基因表达中,有一种非常重要的加工形式,那就是在DNA分子中有一些片段,对于编码蛋白质而言毫无用处

耶鲁公开课 - 生物医学工程探索课程节选

So it's not just merely the case that in fact we are all going to die; it's a necessary truth that we're all going to die.

所以我们会死去,不仅是一个事实;,我们会死去还是必然的真理。

耶鲁公开课 - 死亡课程节选

Because once you actually push people,to pin them down, what do you mean by it,you end up with something that's either just not true, or not interesting,or not necessary, or not particularly unique to death.

因为你一旦逼问他们这到底是什么含义，得到的东西既不会是真实的，也不会是必要和有趣的，也不会是对于死亡来说独特的。

耶鲁公开课 - 死亡课程节选

I know that some felt the pace of the arguments was a little slow, but I felt that this was generally necessary, not only for the unphilosophy-savvy population, but also to cover all points."

我知道有人认为论证过程有点慢，但我感觉这样做总体上讲是有必要的，不只是为了不懂哲学的同学们，也是为了能覆盖所有推理内容“

耶鲁公开课 - 死亡课程节选

If,when we interpret the claim everyone dies alone, that just ends up being a slightly pretentious way of saying everyone dies, we might say,oh yeah,that is true and it is a necessary truth, but it's not especially surprising.

如果我们对每个人都孤独而死的诠释，只是装模作样地说明人终有一死，那我们会说，这是真理，也是必要的，但并没有什么好惊奇的。

耶鲁公开课 - 死亡课程节选