Why is cancer one of the leading killers in the U. S. now but wasn't even on the charts in 1665?

为什么癌症现在是美国人的头号杀手,却甚至没有在一六六五年的名单中出现

耶鲁公开课 - 生物医学工程探索课程节选

There's W.H. Auden, an English-born poet who moved to America.

有奥登，出生于英国却搬到美国去的诗人。

耶鲁公开课 - 现代诗歌课程节选

Other countries have it centralized but in the U.S. it's split up over fifty states.

其他国家均实行国家统一监管,但美国却把监管权分给了各个州

耶鲁公开课 - 金融市场课程节选