(Test) The U.N.Secretary-General says he is "optimistic" a climate-change agreement can be reached in Copenhagen that will include specific recommendations on key elements that will take effect immediately.

VOA: standard.2009.12.09

So, making gene therapy specific is a key problem in making it work.

所以基因治疗中,特异性对能否成功就至关重要了

耶鲁公开课 - 生物医学工程探索课程节选