So, if we take a look at what a single bond is, and let me grab some molecules here.

如果来我们看一下单键，让我拿个分子。

麻省理工公开课 - 化学原理课程节选

4 So it's not just, you can swing by 11:04 and grab a copy and go off and catch some more sleep.

对么？所以你不能打酱油到11：,抓一份笔记拷贝然后离开睡个回笼觉。

麻省理工公开课 - 计算机科学及编程导论课程节选