[相关词组]:takepartinactivitydoexercisejoininmorningexercise爱心活动baiduloveoutreach不法活动anillegalpractice不活动inactive;inoperative;silent舱外活动[Aeronautics]extravehicularactivity(EVA)达标活动targethittingactivities放松活动[Sports]arelaxationexercise;alimbering-upexercise非活动性[Medicine]quiescence高级神经活动[Physiology]highernervousactivity工业谍报活动industrialespionage活动靶amaneuveringtarget