activity job活动作业activityn.活动；活跃vt.表演adj.厉害activity of infiltration渗透活动Activity -based costing作业成本法activitysensing equipment放射性探测设备activity of microorganism生物活性activity analysis problem行动分析问题activity of consciousness意识的能动性activity of Hill reactionactivity-based approach活动分析法activity- based costing作业成本法activity of killing mouse杀鼠活性