英语词汇which is unheard of怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	which is unheard of
释义	unheard of — 一无所闻 which — 何 • 哪 • 哪个 • 哪一个 • 孰 which pron — 其中 pron which?— 什么事 • 恁 unheard-of — 前所未闻 of — 的
随便看	maintain high activity maintain high availability maintain high efficiency maintain high ethical standards maintain high level maintain high quality maintain high quality standards maintain high safety maintain high safety standards maintain high speed maintain high standards maintain himself maintain his position maintain history maintain hydration maintain hygiene maintain identity maintain immunity maintain in accordance maintain in accordance with maintain in a safe condition maintain income maintain income levels maintain industrial production maintain inefficient

英汉双解词典包含2273206条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

unheard of —