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❶have a through understanding of;be well versed in;master (a subject) ❷link up;join up融会～ achieve mastery through a comprehensive study of the subject/豁然～suddenly see the light/把铁路全线～起来link up the entire railway/～南北run south and north
英汉词典共收录311570条英汉翻译词条，基本覆盖所有常用英文单词的例句及中文翻译，是不可多得的英语学习材料。