英语词汇“Opportunity knocks only once”的中英文释义、用法、翻译及短语词组-英汉翻译词典

单词	Opportunity knocks only once
释义	Opportunity knocks only once 翻译机会只敲一次
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英汉翻译词典包含4367426条英汉汉英翻译词条，基本涵盖了全部常用英语单词及常用语的翻译及用法，是英语学习的有利工具。