But they represent for us a direction That the research lab I direct is trying to hid in.

但他们给我们指出了一个方向,我所在的研究实验室就朝着这个方向努力。

麻省理工公开课 - 媒体、教育、市场课程节选

The short answer is that I think these writers best represent all the different threads, all the different forces in the American Novel Since 1945.

简单的回答是我觉得这些作家极洽当地,代表了1945年以来美国小说中的，各种主题和力量。

耶鲁公开课 - 1945年后的美国小说课程节选

It does represent the sum, in the sense that if i gave you four bucks and I gave you five bucks, I gave you effectively nine.

它表示的就是这两个矢量的和,好比是如果我给了你四美元,然后再给你五美元,我其实给了你九美元

耶鲁公开课 - 基础物理课程节选

Now remember that there were only four different colors in the cartoon of the DNA double helix that we talked about and I told you that those colors are really - represent the bases but there's five of them here.

现在要记住只有四种不同的颜色,在双螺旋DNA的卡通模型上出现,我们刚说过这个,我告诉你们的这些颜色,它们代表不同的碱基,不过有五种碱基

耶鲁公开课 - 生物医学工程探索课程节选