Then he would fall down on the floor again like a ball of dirt and start rubbing the side of his head with his back foot as if he had no idea he had been doing any more than any frog might do.

VOA: special.2009.08.29

Typically up till now, we've looked at things that can be done in sublinear time. Or, at worst, polynomial time. We'll now look at a problem that does not fall into that. And we'll start with what's called the continuous knapsack problem.

至今为止我们已经处理过,亚线性问题，最多也就是多项式问题,我们现在要看的问题则是不能用这些解决的,我们将要开始讲连续背包问题。

麻省理工公开课 - 计算机科学及编程导论课程节选

The beginning of fall semester, actually right before classes start,

秋季学期开始，实际上就是在开始上课之前，

加入女生社团 - SpeakingMax英语口语达人

"Unless we reconstruct and maintain the international financial system, if countries start doing it bilaterally instead of multilaterally, the system will fall apart and we will end up in a depression,".

VOA: standard.2009.03.29