You spend time looking for the article and when you find it, there are two different colors.

你花时间找你想要的东西，而当你找到了，有两种不同的颜色。

What do you 课堂 - SpeakingMax英语口语达人

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