On day four, The heavenly bodies that give off light by day or night are created.

在第四天，那些在白天或者晚上发光的天体被创造了。

耶鲁公开课 - 旧约导论课程节选

You're searching three or four things, but nonetheless, you have to do that trade off.

你只是在三个或四个数据中进行查找，但是即使如此，你也必须做一些权衡。

麻省理工公开课 - 计算机科学及编程导论课程节选

They were off by a factor of four.

它们不属于四大元素之一。

麻省理工公开课 - 固态化学导论课程节选

After decades of relatively unspectacular growth, compared to the east Asian economies, India's economy suddenly took off three or four years ago, growing at 8% or more a year.

经历了几十年的相对高速发展后，与其他东亚经济体相比，印度经济三或四年前突然开始腾飞,以每年8%甚至超过%,8%的速度增长。

普林斯顿公开课 - 国际座谈会课程节选

In fact, you don't have to draw it this complicated way, you could just draw it as a line with and hanging off of it, and you would know that that's a DNA molecule four bases long.

实际上你不必画的这么复杂,你只要画几个线条并标明连接的碱基,别人就能知道它是含四个碱基的DNA

耶鲁公开课 - 生物医学工程探索课程节选

Down here, I've just got two things to merge, and then I've got things of size two to merge and then things of size four to merge. But notice a trade off. I have n operations if you like down there of size one.

但是n的大小是不同的，是吗？在这里我们只要合并两个元素,然后是合并长度为2的列表,接下来是合并长度为4的列表,但是观察一下之间的权衡关系。

麻省理工公开课 - 计算机科学及编程导论课程节选

Already from this class if I told you that I gave you energies in some spectrum but they were off by a factor of four, what would you think? Maybe the Z is wrong.

从这节课开始,如果我告诉你我给了你,在某些光谱里的能量,但它们不属于四大元素之一，你会怎么想？也许Z是错的。

麻省理工公开课 - 固态化学导论课程节选