This is more of a spoiler alert, but you've had 41 years to see this movie.

它不只是一个扰流警报，但是你用了41年来看这个电影。

哈佛公开课 - 计算机科学课程节选

I mention this because such complications ? should alert the careful reader. Right?

我提到这个是因为这样的复杂度,是细心读者应要留神的地方，对吗？

耶鲁公开课 - 政治哲学导论课程节选

Because it's a very intense job they have to be alert every moment.

因为是高度集中的工作,他们需要时刻保持警惕。

普林斯顿公开课 - 国际座谈会课程节选

Spoiler alert. And he has a standing offer, he says, "I'll pay whatever the amount is, $10,000 to the first person who can document some effect done in supernatural terms that I can't reproduce through trickery."

他给出一个长期悬赏,他说,我将不计报酬,给第一个在我面前展示,我用魔术无法再现的超自然,现象的人10000美元

耶鲁公开课 - 死亡课程节选

In case any of you would like to get involved in research there are very often colleagues of mine or graduate students who are doing interesting projects who will ask me to alert you to the possibilities of working with them.

如果你们希望参与研究,我的同事和我带的研究生,正在做一些很有意思的项目,他们会让我把这些信息告知你们

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

because all we konw now it's orange alert, the alert level has gone up or gone down We don't really know what it goes on behind the scene.

我们都知道现在是橙色警报，警戒线时高时低,我们真的不知道,事情背后是如何处理的。

普林斯顿公开课 - 国际座谈会课程节选