1. A usually invisible emanation or exhalation, as of vapor or gas. 
   无形排放气常指看不见的排放物，如蒸气或气体等
2. An impalpable emanation; an aura. 
   气味摸不着的排放物；气流
3. An invisible breath, emanation, or radiation. 
   气味看不见的呼吸、放射或辐射
4. A short, forceful exhalation of breath. 
   喘息短促而有力的呼气
5. forceful exhalation through the nose or mouth. 
   从鼻或口有力地呼出气体。

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