off the top of one's head是什么意思，off the top of one's head的翻译，off the top of one's head音标、读音、用法和例句

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off the top of one's head是什么意思，off the top of one's head的翻译，off the top of one's head音标、读音、用法和例句_淳朴汉英词典

off the top of one's head

基本解释