Soros was speaking in Copenhagen,Denmark, where representatives of 192 nations are meeting to draw up an international agreement on tackling climate change.

VOA: standard.2009.12.11

I want you to draw some conclusions about its authorship and the way it was compiled or composed." And so you pick it up and you start reading and you notice features like this.

关于作者的身份，以及创作的方式,做一个总结,带着这些问题，开始读书的时候，你会发现这样的特点。

耶鲁公开课 - 旧约导论课程节选

And, I know I need to come up with four symmetric equi-length bonds, and let's just see, let's draw the structure here.

我想我们需要,4个对称的等长的键，让我们画出CH4的结构。

麻省理工公开课 - 固态化学导论课程节选

So yes,while we have national AIDS programs, while countries are attempting to draw up their national strategies, coverage,in terms of treatment, voluntary counseling and testing and even prevention, is very,very poor.

VOA: standard.2010.07.07

So that means that we don't have to worry about things like wave functions when we're talking about Lewis structures, but because they're so simple to use and because they so often predict the electron configuration of molecules accurately, we end up using them all the time in chemistry, so it's very valuable to know how to draw them correctly and to know how to work with them.

因此这也就意味着我们在讨论路易斯结构的时候,不需要担心波函数之类的东西，但是由于路易斯结构不仅简单易用,而且用它来预测分子的电子排布,经常可以得到非常精确的结果，结果我们在化学中一直都在用它，因此知道如何正确地画出并运用,路易斯结构是非常有价值的。

麻省理工公开课 - 化学原理课程节选