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to appear on stage in an amateur capacity
(of a professional) to make a guest appearance
(fig.) to assume a role outside one's usual duties
to substitute for
汉英双解词典收录197439条英汉双解翻译词条，可根据汉字查询相应的英文词汇，基本涵盖了全部常用汉字的英文读音、翻译及用法，是英语学习及翻译工作的有利工具。