... activity coefficient 活度系数；活性系数；功率因数；功率系数；[放射性]活度系数 activity concentration 放射性浓度 activity curve 放射性曲 ...
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nuclear activity concentration 核活性浓度
activity concentration of 活度浓度
radon activity concentration 氡浓度
activity-concentration relationships 活度与浓度的关系
determination of tritium activity concentration 氚活性浓度的测定
concentration of enzymatic activity [生化] 酶活性浓度
concentration and activity 含量和活性
The activity concentration of 40k is lower than all corresponding values in other countries.
40k的活度浓度低于所有其他国家的相应值。
Evacuation is quite difficult for a large-scale supermarket when fires happen because of the personnel activity concentration, bigger fire density and further dispersing distance.
某大型超市具有人员活动集中、火灾荷载密度较大以及疏散距离超长等特点，需要重视消防设计和安全分析。
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