1. price elasticity of demand 
   需求价格弹性
2. a case of steroid-induced weakness. 
   促发类固醇虚弱的病例。
3. Lack of power or effectiveness; weakness. 
   无力，虚弱缺乏力量或效果；软弱
4. A minor weakness or failing of character. 
   弱点，小缺点性格上小的弱点或缺点
5. Detective stories are a weakness of mine. 
   我偏爱侦探小说。

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• 1. 需求疲软
  {n.}对薄弱环节的调查 weakness of demand...需求疲软 weakness of hands and feet...[医]手足缓弱 weakness of limbs
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