They were looking for differences in gene expression in the guts of the bees.

VOA: special.2009.09.22

This is really the guts of the algorithm 'cause this line here, someone pointed it out before.

这才是算法的核心，因为在这儿，之前已经有人指出过。

哈佛公开课 - 计算机科学课程节选

I'm saying "here comes my main function; here comes the guts of my program."

我指明“这里是我的主函数;,这里是我的程序内容，“

哈佛公开课 - 计算机科学课程节选

That basically says, how close are you the guts of the machine?

那基本上是说，你能有多靠近机器的核心呢？

麻省理工公开课 - 计算机科学及编程导论课程节选