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

They invented the paper machine so they could mass-produce paper-- it didn't have to be handmade anymore-- and they invented wood pulp paper so it didn't have to be made out of cloth anymore.

于是人们发明了造纸机从而可以大量生产纸-,而不再需要手工制作-,后来人们还发明了木浆纸,所以后来不再用布料来制纸。

耶鲁公开课 - 金融市场课程节选