The show will have one host only, and this will be Professor Susan Powell from Harvard University.

这个节目将只有一个主持人，那就是来自哈佛大学的苏珊·鲍威尔教授。

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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

UNESCO, in partnership with the GSMA, will host an invitation-only meeting of high-level government officials to discuss issues relating to mobile learning and policy.

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On 20 February, UNESCO, in partnership with the GSMA, will host an invitation-only meeting of high-level government officials to discuss issues relating to mobile learning and policy.

UNESCO: MEDIA SERVICES

This means that President Bill Clinton and Hillary Rodham Clinton will host only 15 DNC-financed holiday galas this year, down from 25 last time around.

CNN: DNC's Money Woes Crimp Clintons' Holiday Style