So, remember when you're looking at your periodic table, don't forget about the lanthanides, sometimes they come into play.

因此，要记住，当你在看元素周期表时，不要忘了镧系元素，有时候也会用到它们。

麻省理工公开课 - 化学原理课程节选

I wrote it down your notes, if you can put a big star next to it so you don't forget this.

我写在了你们的讲义里，如果你们在旁边画上一个,大星号就不会忘记了。

麻省理工公开课 - 化学原理课程节选

Now hopefully you're keeping a sheet of paper with you and you're writing down what you eat so you don't forget everything, and then you sit down at your computer at the end of the day and you log it all in.

希望你们可以随时带张纸,以便随时记下,吃的东西以防忘记,然后坐在电脑前,在一天结束时输入电脑

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选