because that is a skill that they need to do when they are older, filling out forms and what did one actually look like to get a passport in USA.

因为这是他们将来,必需的技能，填写表格，以及在美国,如何取得护照。

麻省理工公开课 - 媒体、教育、市场课程节选

But I think, you know, maybe that was necessary because it's an important relationship.

但是我认为，可能那是必需的，因为这层关系太重要了。

英国的首相们 - SpeakingMax英语口语达人

This must be the beginning of their education, Socrates says, making the children spectators of war.

这必需是他们的基础课程，苏格拉底说，让孩童们成为战争的旁观者。

耶鲁公开课 - 政治哲学导论课程节选

This is the kind of surveillance that's needed to really make an impact and this is why-- one of the other ways where engineering approaches are needed in order to solve medical problems like this one.

这是一种必需,起到一定作用及,影响的监测观察,并且这就是,这也是在解决类似这种医学问题时,必须采取工程方法的原因

耶鲁公开课 - 生物医学工程探索课程节选

I would even say the necessary and inevitable conflict between the freedom of the mind and the requirements of political life.

我甚至会说，这是必需,且无可避免的冲突，介于,思想自由与政治生活条件之间。

耶鲁公开课 - 政治哲学导论课程节选