What exactly that purgation will entail and why Milton's voice needs to be purged at all I think these questions are really the subject of the entire rest of the poem.

这种净化是很有必要的,弥尔顿的语言为什么需要被完全净化,我认为这个问题才是所有剩余诗歌,真正的主题。

耶鲁公开课 - 弥尔顿课程节选

So I think after 10 hours, you don't really have to be concerned about that.

所以，现在才过了10小时，你完全没必要担心。

Don't 实战 - SpeakingMax英语口语达人

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

And, the stuff will be posted at the website so you don't have to copy it all down.

这东西随后会放到网上,因此你没有必要完全抄下来。

麻省理工公开课 - 固态化学导论课程节选

As completely as was possible and is necessary, would you choose to do it?

如果完全可能而且必要，你会这样做吗？

麻省理工公开课 - 媒体、教育、市场课程节选

And this is so that they could have more possible user IDs not because they have billions and billions of users but surely people create accounts to lead accounts and they don't necessarily have to reuse numbers this way.

这样他们就能有很多的用户ID了,倒不是因为他们有成千上万的用户,而是创建账户来引导其他账户,其实他们完全没有必要以这种方式复用。

哈佛公开课 - 计算机科学课程节选