The Democracy Video Challenge was launched last year at the United Nations on September fifteenth, International Democracy Day.

VOA: special.2009.10.02

If you take a look at the last day, or the day before, you will see that we talked about average valence electron energy.

如果你注意到昨天或者前天的事，你将看到,我们讨论的是平均价电子能。

麻省理工公开课 - 固态化学导论课程节选

Last day we looked at Rutherford, Geiger, Marsden and the experiment that they conducted on the gold foil.

昨天我们讲了卢瑟福，盖革，马斯登,以及他们在金箔上所做的实验。

麻省理工公开课 - 固态化学导论课程节选

At last came the day when I took the train to the university.

VOA: special.2010.01.30

Quote "On the 24th day, as we were having our breakfast, a ship appeared at last."

他写道，第24天，我们正在吃早餐，终于有船来了“

耶鲁公开课 - 公正课程节选

I'm going to post PowerPoints for all the lectures, hopefully at least the day before the lecture takes place, so I posted this last night.

我会把课程所有的幻灯片挂到网上,希望至少在上课的前一天完成这件事,因此我昨天晚上把今天的幻灯放上来

耶鲁公开课 - 生物医学工程探索课程节选

Now, last day, we looked at the energetics of the ionic bond, right?

昨天，我们讲的是离子键的热力学，对么？

麻省理工公开课 - 固态化学导论课程节选

And, as I reminded you at the end of last day, the only reason I am doing this for you right now is I want to elucidate the principles.

就像我上次课的最后跟你们说过的那样，我现在给你们讲这些,仅仅是我想把原理阐释清楚。

麻省理工公开课 - 固态化学导论课程节选