noun🔗Share真空A region of space that contains no matter."In science class, we learned that vacuums exist in outer space. "理科の授業で、真空は宇宙に存在することを学びました。spacephysicsastronomyscienceChat with AIVocabulary GamePractice Reading
noun🔗Share掃除機(plural only "vacuums") A vacuum cleaner."The store sells vacuums of different brands and prices. "その店は、さまざまなブランドと価格の掃除機を販売しています。utilitytechnologyutensilmachinedeviceChat with AIVocabulary GamePractice Reading
noun🔗Share真空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"水銀柱26インチ、または1平方インチあたり13ポンドの真空。physicsconditiontechnologymachinescienceChat with AIVocabulary GamePractice Reading
noun🔗Share真空A spacetime having tensors of zero magnitude"Theoretical physics explores vacuums, regions of spacetime devoid of matter and energy, to understand the fundamental laws of the universe. "理論物理学は、宇宙の基本的な法則を理解するために、物質とエネルギーのない時空の領域である真空を探求します。physicsspacetheoryChat with AIVocabulary GamePractice Reading
verb🔗Share掃除機をかけるTo clean (something) with a vacuum cleaner."She vacuums the living room carpet every Saturday morning. "彼女は毎週土曜日の朝にリビングルームのカーペットに掃除機をかけます。utilitytechnologymachinedeviceworkactionChat with AIVocabulary GamePractice Reading
verb🔗Share掃除機をかけるTo use a vacuum cleaner."Every Saturday morning, my dad vacuums the living room. "毎週土曜日の朝、父は居間を掃除機で掃除します。utilitytechnologymachinedeviceserviceactionChat with AIVocabulary GamePractice Reading
verb🔗Shareデータベースを最適化するTo optimise a database or database table by physically removing deleted tuples."The database administrator vacuums the user table every week to improve performance by removing old, deleted accounts. "データベース管理者は、古い削除済みアカウントを削除してパフォーマンスを向上させるために、毎週ユーザーテーブルを最適化します。computingtechnicalChat with AIVocabulary GamePractice Reading
