The power of linearity is F=k1+k2 if I come across f of x, y, z equals k1 plus k2, if it is a linear equation, I don't have to go and solve it all over again.

线性的威力是,一个方程，如果它是个线性方程，那么我就不用再去解他了。

麻省理工公开课 - 固态化学导论课程节选

and I had to insult him in Shakespearean English. I said,

而且我不得不用莎士比亚英语侮辱他。我说的是，

记忆犹新的作品 - SpeakingMax英语口语达人

Because he taught people, "You don't have to obey the Jewish law."

因为他对人们说，“你们不用遵循犹太律法“

耶鲁公开课 - 新约课程节选

He speaks in a language of math and it is very important for students to be able to have hot copies so that they can take notes on the paper rather than be working very hard to copy down the equations that he used in these lectures.

他以数学语言授课,所以发给学生教学材料,是非常重要的,这样就可在纸上做笔记,而不用拼命,抄下他在课上,用到的等式。

麻省理工公开课 - 媒体、教育、市场课程节选

Thank you, Bumpy," I call back. "You're welcome," says Bumpy.

谢谢你小颠“，我回头说，他说：，“不用谢“

耶鲁公开课 - 文学理论导论课程节选

There's no liability attaching to him.

他不用承担任何责任。

耶鲁公开课 - 旧约导论课程节选

Suppose standing on the bridge next to the fat man, I didn't have to push him, suppose he was standing over a trap door that I could open by turning a steering wheel like that.

假设我站在桥上，胖子就在我旁边，我不用去推他，假设他踩在一扇活板门上方,而活板门可以通过转动方向盘来开启。

耶鲁公开课 - 公正课程节选