I'll bet you, even if you're reading this for the second or the third time, you were surprised again when you came to this point.

我敢说，即使是第二遍或第三遍读这首诗,读到这儿时你们还是会感到惊讶。

耶鲁公开课 - 弥尔顿课程节选

For example, how do I know that when I pull the spring the first time for the mass, it exerted the same force when I pulled the spring the second time for the elephant?

例如 怎样才能知道,第一次连着物体拉弹簧时,产生的力和,第二次连着大象拉弹簧时产生的力是相等的呢

耶鲁公开课 - 基础物理课程节选

I differentiate a second time and check the sign, so the second order condition, I differentiate this expression again with respect to q1.

我们对它进行二次求导然后看符号,这个式子的二阶导数,就是一阶导数再对q1进行求导

耶鲁公开课 - 博弈论课程节选

You don't mind watch it a second time Actually I watched it many times, on DVD in particular. Did you use the DVD?

你们不介意再看第二遍吧,事实上我看了很多遍，特别是看DVD，你们看DVD吗？

麻省理工公开课 - 电影哲学课程节选