英语短语词组词汇be at pains的音标、释义、翻译、用法及例句-英语短语词组词典-老街网

短语	be at pains
释义	be at pains 尽力；用心；下苦功夫；费尽苦心；尽力设法
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老街网英语短语词组词典共收录525608条英汉双解短语词组词条，基本涵盖了全部常用短语词组的翻译及用法，是英语学习的有利工具。