| 单词 | on the alert |
| 释义 | on the alert 警惕着，警戒着，警觉着；提防着，防备着；密切注意着；随时准备着 以上来源于：《21世纪大英汉词典》 on the alertphr.① 注意，提防，小心<for, to-V>The armed forces were on the alert.三軍在警戒。He was instructed to be on the alert for any indications of battle.他奉命注意任何戰鬥的跡象。They were constantly on |
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