复数 第三人称单数 n. 真空, 真空状态, 真空度, 空洞, 真空装置, 真空吸尘器, 空虚 n the absence of matter n an empty area or space n a region that is devoid of matter n an electrical home appliance that cleans by suction v clean with a vacuum cleaner 原型: vacuum 英汉双解字典由 ECDICT 提供