If I want to move into a directory and you'll see-- all of these will be walked through in the first problem set.

如果进入一个目录，你们会发现-,所有步骤都在,第一个习题集中提到过。

哈佛公开课 - 计算机科学课程节选

And this is the first descriptive step to developing a theory of laughter.

这是第一个描述性的步骤,来建立笑的理论。

耶鲁公开课 - 心理学导论课程节选

Now you start a process, a cyclic process, where the first step in the process is denaturing the DNA.

然后你就可以开始一个循环步骤,第一步是使DNA变性

耶鲁公开课 - 生物医学工程探索课程节选