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physical activity

physical activity
体力活动; 体育活动


1. the quality or process of exerting energy or of accomplishing an effect. 2. a thermodynamic quantity that represents the effective concentration of a solute in a non-ideal solution. Symbol a. 3. the number of disintegrations per unit of a radioactive material. Symbol A. 4. the presence of recordable electrical energy in a nerve or muscle. optical activity.

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