This led people to go back and look at the places that were manufacturing the vaccine to make sure that they were all producing vaccine of the proper quality.

这现象让人们回溯并且审视,制作疫苗的地方,以确认他们生产的疫苗,质量都合格

耶鲁公开课 - 生物医学工程探索课程节选

But in fact, in his own way, he's talking about his inability ; to keep his child alive there; in a kind of metaphorical way, speaking of his failure to build a fence to last.

但事实上，以他自己的方式，他在诉说自己的无能,不能让孩子活下来;,以一种象征性的方式，谈论自己不能制作出一个一直在那的栅栏。

耶鲁公开课 - 现代诗歌课程节选