noun🔗Share真空，虚空。 A region of space that contains no matter."The scientist studied the vacuum in space to understand how stars form. "科学家研究太空中的真空，以了解恒星是如何形成的。spacephysicsastronomyscienceChat with AIVocabulary GamePractice Reading
noun🔗Share吸尘器，真空吸尘器 (plural only "vacuums") A vacuum cleaner."My mother uses the vacuum to clean the living room floor every week. "我妈妈每周都用吸尘器打扫客厅的地板。utilitydevicemachineChat with AIVocabulary GamePractice Reading
noun🔗Share真空，虚空。 The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, such as the condenser of a steam engine, which is nearly exhausted of air or steam, etc."a vacuum of 26 inches of mercury, or 13 pounds per square inch"真空度为26英寸汞柱，也就是每平方英寸13磅的压力。physicsconditionsciencetechnologyChat with AIVocabulary GamePractice Reading
noun🔗Share真空 A spacetime having tensors of zero magnitude"The vacuum of space allows satellites to travel freely without air resistance. "空间的真空状态使得卫星能够不受空气阻力自由运行。physicsspacetheoryChat with AIVocabulary GamePractice Reading
verb🔗Share用吸尘器打扫，吸尘。 To clean (something) with a vacuum cleaner."Before the party, I vacuumed the living room rug to remove the dust. "派对前，我用吸尘器把客厅的地毯吸了一遍，把灰尘都吸掉了。utilitytechnologymachinedeviceworkactionChat with AIVocabulary GamePractice Reading
verb🔗Share用吸尘器清扫，吸尘。 To use a vacuum cleaner."My mom vacuumed the living room before the guests arrived. "我妈妈在客人来之前用吸尘器把客厅吸了一遍。utilitytechnologymachinedeviceChat with AIVocabulary GamePractice Reading
verb🔗Share清理，优化 To optimise a database or database table by physically removing deleted tuples."The database administrator vacuumed the student records table to improve its performance. "数据库管理员清理并优化了学生记录表，以提高其性能.computingtechnologyChat with AIVocabulary GamePractice Reading
