Because usually it doesn't work. And so one of the things that I think is very important is to always begin by testing each unit.

因此我认为非常重要的一件事情,就是开始测试的时候先对,每个独立单元进行测试。

麻省理工公开课 - 计算机科学及编程导论课程节选

And then it's the situation where you just don't know where to begin.

这时就出现你,不知道如何下手的局面。

哈佛公开课 - 计算机科学课程节选

He does tell you all about the legends first, but he puts them aside and says they're just legends--now let's talk history, and he doesn't begin that until the eight century B.C.

他先将神话传说展示给读者,然后将其放到一边,对读者说,这些只是神话而已,现在咱们说说历史,而他讲的历史是从公元前八世纪开始的

耶鲁公开课 - 古希腊历史简介课程节选