偵察
reconnoitre;scout
進行～活動conduct reconnaissance;carry out reconnoitring activities/敵后～ reconnoitre the enemy rear/火力～ reconnaissance by fire/～敵情gather intelligence about the enemy/～兵scout/～部隊reconnaissance troops(or unit);scouting force/～飛行reconnaissance flight/～機reconnaissance plane;scout/～衛(wèi)星spy(or reconnaissance)satellite/～員scout