And so the G-20 meeting, where leaders representing 80 percent of the world economy will be present, is an extraordinary opportunity for Obama precisely to show the U.S.leadership that he has been talking about,".

VOA: standard.2009.03.31

I have an ad i'll show you later in the class for Honey Nut Cheerios where people are talking about how they're having to suffer by eating Honey Nut Cheerios to lower their cholesterol level.

健康宣示:美国食品药品管理局认可并允许的对某种食品促进健康能力的公开宣传 我有一个广告,一会儿会给大家演示,关于坚果甜麦片,这种常被人们谈及的食品,如何通过,吃坚果甜麦片,来降低胆固醇含量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So, for example, if we look at sodium channels, and sodium channels are some of the particularly prevalent ones when we're talking about neurons, if you think about the cell membrane, and this little green cartoon is me trying to show a sodium channel here, and in this case, you can see that it's closed, such that no ions are getting through.

比如，让我们来看一下钠离子通道，钠离子通道是我们会经常遇到的几个之一,在讨论神经元的时候，如果大家想想细胞膜，而这个绿色的小示意图就是我用来表示,钠离子通道的，在这种情况下，大家可以看到它是关闭的，因此没有离子可以通过。

麻省理工公开课 - 化学原理课程节选