I heard him speak when I was teen.

当我还是少年时，我曾听过他演讲。

普林斯顿公开课 - 人性课程节选

I've heard him talk before but it's always interesting.

我曾听过他讲课,他总是不断创新

耶鲁公开课 - 金融市场课程节选

And he ended with the position that the only way to put pressure on spending was by cutting taxes I never heard him use the phrase " but he subscribed to the starve-the-beast thesis.

到最后，他倒过来了,说，要想给政府施压，来削减财政支出,减税是必由之路,他倒是没有明确说,但依我看，他用的这招叫“把帽子扔过墙去。

斯坦福公开课 - 经济学课程节选