You don't understand. If you did, you'd come with me.

VOA: special.2010.05.15

And if you believe in liberty, you'd better understand there are multiple ways to achieve liberty.

如果崇尚自由，最好要明白有很多方法,可以获得自由。

普林斯顿公开课 - 国际座谈会课程节选

I don't understand why you'd want to take a pill to fix something that we know little about.

我不明白为什么你会愿意吃药片来治好一些我们甚至都不清楚的毛病。

对付压力的方法 - SpeakingMax英语口语达人