The preservation of opportunity in the face of unforgiving tradeoffs, and the capacity to exercise a degree of freedom to pursue one' s talent, ______ me as a centrally important principle in the emerging society.

单项选择题Such initiatives can pay generous dividends in a continent ______ a large and talented scientific community which, although largely educated in the United States and in Europe, is strongly inclined to return home to do science.

单项选择题It is also important that the public should recognize the current debate for what it is: scientists behaving ______, as they should.