to keep your ear to the ground

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1.	消息灵通成语精选 II-:- Flash... ... to keep your ear to the ground 消息灵通 to have your ear to the ground 博学多闻, 万事通 ... cueflash.com

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英汉双解词典包含2704715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。