英语词汇“be-up-on-something”的意思、释义、用法及双语翻译-时代网

词汇	be-up-on-something
释义	请查阅词条:be well up in/on something
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时代网英语在线翻译词典收录了323754条英语词汇在线翻译词条，基本涵盖了全部常用英语词汇的中英文双语翻译及用法，是英语学习的有利工具。