None of these do we have vaccines for, and it's turned out that sexually transmitted diseases for a variety of reasons, we'll come back to later, are particularly difficult to develop vaccines for.

这些病我们都没有疫苗,已经证明,对于性传播疾病,有很多原因使得,我们稍后回来再讲,针对这类疾病的疫苗特别难做出来

耶鲁公开课 - 生物医学工程探索课程节选

and then spreads to the next state like Denver and so, such and such like Colorado.

然后再传播到各地，像丹佛，像科罗拉州。

进步的旧金山 - SpeakingMax英语口语达人

You can go buy a score of the Beatles, for example--although they didn't design this initially with music, but after the fact,people sort of listen to it and make written-- put in written form what had originally been just an aurally conceived artistic statement.

你完全可以去，比如说买一些披头士的乐谱，但是他们当初写歌的时候并没有想用乐谱的形式传播，事实是人们听了他们的歌，再把它们写下来-,人们只是把一项为听觉设计的艺术品用笔记录下来。

耶鲁公开课 - 聆听音乐课程节选