But rather than celebrating Nigeria's status as not only host nation but also defending champion of this event, local organizers and FIFA officials alike will instead be holding their collective breath, hoping that the country pulls through the three-week long tournament without any major problems.

VOA: standard.2009.10.22

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