| 单词 | on (the) alert |
| 释义 | 警戒着，防备着；随时准备着；密切注意着 The government has put (或 placed) be on full alert go on (the) We must be on the alert to discharge our responsibilities toward the friendly countries. be on the alert for traffic signals |
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英汉双解词典包含548777条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。