But it is not necessary for me to praise my superior.

VOA: special.2010.01.24

The fact that I have this star here, this star here, this star here, is really just 'cause I'm a little anal and it looks pretty to make a little box out of everything but it's not strictly necessary.

事实上大家可以看到，这有颗星，这有颗星，这有颗星，其实是我手痒,这看起来像是用*围成个框，把它们包围起来,其实这是完全没有必要的。

哈佛公开课 - 计算机科学课程节选

Leisure does not simply mean rest or inactivity but leisure is necessary for education or what he sometimes calls by the term philosophy.

安逸不单意指休憩或静止不动,安逸是教育的必备条件,或是套用,他有时会使用的词汇－哲学。

耶鲁公开课 - 政治哲学导论课程节选

But Cheney said he is not sure the Obama administration will do what is necessary to keep Iran from developing nuclear weapons.

VOA: standard.2010.02.14

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

"If in the future, banks need exceptional assistance in order to get through this, then we will make sure that assistance comes with conditions, not just to protect the taxpayer, but to make sure this is the kind of restructuring necessary for them to emerge stronger.

VOA: standard.2009.04.05

It's not necessary very well formatted but it looks pretty complex, right?

排版不是很整齐,看起来也非常复杂，不是吗？

哈佛公开课 - 计算机科学课程节选

Identity is not necessary, but contingent, as the philosophers put it."

同一性不是必然的,而是偶然的,就像哲学家们常说的

耶鲁公开课 - 死亡课程节选

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

Finally though, the point that he makes is a terrific one, all of these things seem natural to us but the reason why they seem natural is not because they are in some sense necessary or logical truths.

最后，尽管，他表达得很好，所有这些对我们而言很自然,但我们认为他们自然的原因,并非他们是必要的,或是逻辑真理。

耶鲁公开课 - 心理学导论课程节选

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

Here, too, gets a little ugly and this is why I tend not to like this construct, at least in C, but sometimes it's necessary or it's the simplest way to achieve this goal.

这里也有点难看的，这也是为什么我,不太喜欢这个结构，至少在C语言中，但是有时它是必须的,或者它是达到目标最简单的方法。

哈佛公开课 - 计算机科学课程节选

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

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