"Public education is our greatest tool - arming people with knowledge about the ways in which common criminal enterprises have tried to take advantage of them."

VOA: special.2011.06.24

And this is a tool with which you can navigate all the things that we know about going on campus.

这是你能够掌控,校园中发生的所有事情的一个工具。

哈佛公开课 - 计算机科学课程节选

So, think about the birches as a tool, another tool, but this time a tool for play, a tool for playing alone.

把桦树看成一种工具，另一种工具，但是这次是玩的工具，只是玩的工具。

耶鲁公开课 - 现代诗歌课程节选

Well, a whole bunch of stuff but the only one I care about right now is a tool called printf.

恐怕整个教室就我一个人关心,这个printf函数吧。

哈佛公开课 - 计算机科学课程节选

OK, so how can I code this up? Well, you might think, let's just jump in and write some code, I don't want to quite do that though, because I want to show you another tool that's valuable for thinking about how to structure the code, and that is a something called a flow chart. Now.

好，那么我怎么把这个以代码实现呢，你可能会想，让我们进去直接写代码把,但是我不想这么做，因为我想教给大家另外一项很有价值的,用来组织代码的工具，叫做流程图,现在，像Guttag教授,和我这么大岁数的人。

麻省理工公开课 - 计算机科学及编程导论课程节选