knock-off block是什么意思，knock-off block的翻译，knock-off block音标、读音、用法和例句

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knock-off block是什么意思，knock-off block的翻译，knock-off block音标、读音、用法和例句_淳朴汉英词典

knock-off block

基本解释

专业释义

能源科学技术