Now, it's Milton's annotators who tell us that the word prevent means "to come before, to anticipate," and on some level it obviously means that and that goes without question.

弥尔顿的注解告诉我们阻止一词的含义,“在某人之前到达，预期“,从某种程度上说它就是那个意思，这毫无疑问。

耶鲁公开课 - 弥尔顿课程节选

but rather when you're telling somebody that they should or should not do something.

而是用于告诉某人他们应该做或者不应该做某事。

I'm sure 课堂 - SpeakingMax英语口语达人