If you put your fingers between the plastic opening at the bottom, and here's where you gotta watch out for the spring, pull the thing apart and that's it.

如果你把手指放到,底部的缝隙中间，这里你需要小心，你剥开就会发现这个了。

哈佛公开课 - 计算机科学课程节选

You cannot have a spring pulled only at one side, because then it will then accelerate with infinite acceleration in that direction.

你不可能对弹簧只施加一边的拉力,因为那样的话弹簧就会以无穷大的加速度加速,就在这个方向上

耶鲁公开课 - 基础物理课程节选

He was here at Yale as a visitor in the spring for many years.

有很多年的春天他都在耶鲁大学访学。

耶鲁公开课 - 文学理论导论课程节选

At least, he was taking it until Spring Break.

至少在春假前他一直在上这门课。

耶鲁公开课 - 死亡课程节选

Then, let's look at the spring.

我们再来看看弹簧

耶鲁公开课 - 基础物理课程节选