to move away from the main subject you are writing or talking about and to write or talk about something else:
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Digressing and being indirect or evasive
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(in speech or writing) to move away from the main subject and discuss something else:
英语词典包含110679条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。