It's a common mistake to make if you forget that I've actually declared that variable up top, but wait a minute, I know any time that I use a variable, I have to declare it.

这是一个通常犯的错误，如果你忘了,之前在前面已经声明了这个变量，等等，我知道在任何时候,我使用一个变量，我必须声明它。

哈佛公开课 - 计算机科学课程节选

Monday evening will be the time at which the midterm exam will be posted on the website, and that'll be at 6:00 pm Monday evening. You'll have a 24-hour period of time in which to find--I forget what I said--30 or 40 minutes? It'll be clear on the instructions. To just sit and treat it as if you're in an in-class exam situation, and write your essay.

周一晚上期中考试的内容会,粘贴到网站上，应该是晚上六点,你可以在一天之内抽出30到40分钟完成考试0,这在说明上都写明了,就把它当作课堂考试对待，写一篇短论文。

耶鲁公开课 - 旧约导论课程节选