weak D弱D
weakadj.弱的;虚弱的;无力的;差的;淡薄的
weak sewage淡污水
weak ground破坏
weak notion弱概念
weak doping弱掺杂
weak source弱源
weak liquor稀液
weak-link弱节
weak groups弱势群体
weak strata软弱地层
weak handle不结实的把手