It doesn't matter if you've never heard of them or if you never think of them again-- but, Titian. The famous Titian.

你们没听说过或者听完课就忘了也没关系,例如著名的提香

耶鲁公开课 - 欧洲文明课程节选

Of course, the "where" questions are very simple and you've heard them before.

当然，“where”问句非常简单，你之前肯定听说过这个用法。

Where 课堂 - SpeakingMax英语口语达人

Now it's possible somebody said both these sentences before, but you probably have not heard them.

有可能某人曾说过这两句话,可你们却并没听到过

耶鲁公开课 - 心理学导论课程节选

I heard one of them say to an imaginary suitor, "and you without health or a home."

我听到有人对臆想的原告说，你没有健康，你没有家庭“

耶鲁公开课 - 现代诗歌课程节选

You've got to think about that and what it means and how were they transmitted and preserved without ; the means of technology, obviously, that we have today; and what was so exciting in the middle of the twentieth century was the discovery of the Dead Sea Scrolls.I'm sure that you've heard of them.

你们需要考虑到这点及这意味着什么,还有在没有当今我们所拥有的技术的年代,是如何传播和留传下来的;,在20世纪中期时最令人兴奋的就是发现了,死海古卷，我确定你们曾经听说过。

耶鲁公开课 - 旧约导论课程节选

bug If you find a bug, it probably means there bug are more of them. So you ought to be bug a little bit careful. The story I've heard told is you're at somebody's house for dinner, and you're sitting at the dining room table, then you hear a .

对不对？你得修复这个,如果你发现了一个,可能就意味着还有更多的,因此你应该小心点，我听说的一个故事，是当你在别人家吃饭的时候，你坐在餐桌上呢，然后听到了邦的一声响。

麻省理工公开课 - 计算机科学及编程导论课程节选