短語詞組短語on ones guard 警惕;提防Be on your guard 發(fā)現(xiàn)敵人了;你們應(yīng)當(dāng)謹(jǐn)慎;你們務(wù)要儆醒regulation on door guard 門衛(wèi)管理規(guī)定on -guard 副詞警覺狀態(tài)中staying on your guard 保持警惕be on our guard 戒備著on onehas guard 警戒on our guard 警惕on n guard 站崗;警惕 返回 on guard