activity job活动作业activityn.活动；活跃vt.表演adj.厉害activity group therapy活动群体治疗activity report system活动报表系统, 活动报告系统activity working space活动工作区Activity of tyrosinase酪氨酸酶活性activity of medic seed种子活力activity chain address活动链式地址activity of landslides滑坡活动activity restart cycle活动再启动周期activity area teaching活动区教学activity determination活性测定