Producers hoped this year's host, actor Neil Patrick Harris, would add some zest to the program, and several Emmy recipients had warm praise for his performance.

VOA: standard.2009.09.21

Well, it turns out that we could not identify, at least at that point, a cell culture that would serve as a host for vaccinia.

然而我们还不能断定,至少这个时候无法断定,这些被感染的细胞就是牛痘病毒的宿主

耶鲁公开课 - 生物医学工程探索课程节选

Stephanie Pines was doubtful another future bid would have the same support from such notable figures as talk show host Oprah Winfrey and President Barack Obama.

VOA: standard.2009.10.02

Throughout the more than year-long preparatory process, FIFA reports indicated that the Nigerians were well behind schedule in assuring that the proper infrastructure would be in place to host the event.

VOA: standard.2009.10.22