有人事先告诉过我要出什么事。

I had been warned what to expect.

《牛津词典》

我可以事先告诉你们，我所希望得到的俄方反应。

I'll tell you what reaction I hope I get from the Russians.

youdao

事先告诉用户在注册后能得到的好处是非常重要的。

It is important to inform the user up front of what they will gain after registering.

youdao

I'll tell you what reaction I hope I get from the Russians.

我可以事先告诉你们,我所希望得到的俄方反应。

耶鲁公开课 - 金融市场课程节选

And so similarly as Gmail's priority inbox, it's gonna be pretty flawed for a lot of us at least initially because it just doesn't know the answers a priori correctly unless we teach it or program it to be better. There is also another flaw in here or multiple flaws arguably.

类似于Gmail的优先收件箱，在起初使用时对大多数人来说它是有缺陷的,因为它不知道如何正确判断优先级,除非我们事先告诉它或编写程序改良它,另外这里存在一个或多个漏洞，可以说是缺陷。

哈佛公开课 - 计算机科学课程节选