Hardy wants to use really old dialect words, when he can, and there's power in that. And this is a poem composed in 1915.

哈迪在他可以的时候总是想使用真正的古代方言，而在其中是有力量的，这是一首在1915年作的诗。

耶鲁公开课 - 现代诗歌课程节选

They had to give some of them the real vaccine and some of them a placebo vaccine in order that they could really tell if the vaccine worked; you have to have it placebo controlled.

研究者们还须给部分孩子接种真正的疫苗,给另外一些孩子接种空白疫苗,以分辨疫苗是否真的有效,所以你必须使用安慰剂作对照

耶鲁公开课 - 生物医学工程探索课程节选