And this is very much deliberate on our part so you just don't feel that inevitable angst when it comes to asking what you think is a dumb question and probably isn't, but you don't need to disclose your name.

这在我们的角度上来说是非常深思熟虑的,所以你们不要认为那是必然的麻烦,当问了一个你认为是愚蠢的问题,或者可能不是，但是你不必要,公开你的名字。

哈佛公开课 - 计算机科学课程节选

beauty pageants take the time needlessly of both the participants and the viewers

选美比赛占用了参赛选手以及观众不必要的时间。

选美大会，很不错 - SpeakingMax英语口语达人

Rather than thinking of a teacher necessarily, one can think of an individual acts more like a mentor or coach in certain settings.

不必要一定要有个老师，你可以想成一个人在某个领域,作为指导者或是教练。

麻省理工公开课 - 媒体、教育、市场课程节选

Let's make the red light the symbol of 'go.'" And now with the ecological movement it would be very difficult to make the green light the symbol of "stop," and in any case all sorts of complications would arise. Right?

我们来假设，红灯的意思是出发“,那么难道,绿灯的意思是停止吗？,这样会引起各种不必要的麻烦？

耶鲁公开课 - 文学理论导论课程节选

Don't put in extra bells and whistles if it's not necessary.

不必要的话不要放进去,多余的铃声和口哨声。

麻省理工公开课 - 固态化学导论课程节选

Banks, as I say, are with us to stay; we just have to improve our regulation and disclosure requirements so that banks can be prevented from taking unnecessary risks.

如我所说,银行与我们同在,我们只需要完善对监管,和信息披露需求,这样银行就可以避免追求不必要的风险

耶鲁公开课 - 金融市场课程节选

When you're all out of specific cases and you want to handle everything else, you literally say "default:" And here I could end the program with break, but it's kind of unnecessary because once I'm at the bottom of the curly braces, that's it.

当它不在你列出的所有情况中,为了处理其他的情况，你可以用“default：“,这里我可以用break来终止这段代码，但是它是有点,不必要的，因为我已经在这个花括号的,底部了，就这样了。

哈佛公开课 - 计算机科学课程节选