The only way that we knew how to grow it reliably was to grow it in its natural host: cows.

那目前我们所知道的唯一途径就是,利用它的自然宿主,奶牛

耶鲁公开课 - 生物医学工程探索课程节选

It seemed I had a whole host of memories going back to 1750 in England and that I was in San Francisco now only in another life and in another body.

似乎全部记忆都回到了1750年的英格兰,而现在在圣弗兰西斯科的我则是另一个人，在另一种生活里。

耶鲁公开课 - 1945年后的美国小说课程节选

Now in this case the host - you want the host not only to replicate all the DNA, you want it also to express the gene.

而这种情况下宿主--,你不只希望宿主复制基因,同时也想使之表达基因

耶鲁公开课 - 生物医学工程探索课程节选

In this case here, you're generating host cells, cytotoxic T-cells, that can kill only very specific cells, cells that are expressing this foreign antigen.

而在这个例子中,人产生宿主细胞,即细胞毒性T细胞,它只会消灭特定的细胞,也就是携带特定异己抗原的细胞

耶鲁公开课 - 生物医学工程探索课程节选