alert
adj. 警惕的,警觉的;机敏的,敏捷的;意识到,注意到(alert to); v. 向……报警,使...
adj.提防的,警惕的n.警惕,警报
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adj. 警惕的,警觉的;机敏的,敏捷的;意识到,注意到(alert to); v. 向……报警,使...
adj.提防的,警惕的n.警惕,警报
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