I want to just go over the requirements of the course that really are required, not the optional piece, just so that you understand what my purpose is pedagogically.

我只想跟大家回顾一下,这门课程的必须要求，并非可以自由选择的,这样你们会理解我的目的何在。

耶鲁公开课 - 1945年后的美国小说课程节选

W -W -W And now pedagogically, all these things, -W, -W, -W, these are essentially telling GCC to be really nit-picky.

现在教学上用的这些东西，这些本质上说明GCC是很挑剔的。

哈佛公开课 - 计算机科学课程节选