Warning: file_put_contents(/www/wwwroot/ppbbu/bieo.cn/cache/3ad7c44bc9df68b3ff26899e3ba651ce.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/bieo.cn/index.php on line 58 population adverse selection例句_population adverse selection英汉例句_population adverse selection双解例句_衣物護欧路词典
The adverse selection of population quality of China is not only the research object of many subject, but also is arguing focus of academe. 中國的人口素質逆淘汰問題不僅是多學科的研究對象，而且是學術界爭論的焦點。