population adverse selection

常見例句

雙語例句

• 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(zhì)逆淘汰問題不僅是多學(xué)科的研究對象，而且是學(xué)術(shù)界爭論的焦點(diǎn)。
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