She says people must keep up their guard against the virus, which is unpredictable and could change into a far more dangerous form.

VOA: standard.2009.12.29

So with that said, perhaps just to add to that, the fourth passage: "Beauty is the form of the purposiveness of an object so far as it is perceived in it without any representation of a purpose."

所以据上所述，啊，再加一点，现在看，第四篇文章：，“美是事物存在的目的,尽管这种合目的性并不是显而易见的，你可能要问了“

耶鲁公开课 - 文学理论导论课程节选

He says the tuberculosis epidemic is far from over and is being aggravated by multi-drug resistant TB and its even more dangerous form, extensively drug-resistant TB.

VOA: standard.2009.12.09