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n.真空; 真空状态; 空白; 空虚; (用真空吸尘器所做的)清洁，清扫v.用真空吸尘器清扫 复数：vacuums第三人称单数：vacuums现在分词：vacuuming过去式：vacuumed过去分词：vacuumed 牛津词典 noun 真空a space that is completely empty of all substances, including all air or...
