vacuum 中文
EN
[ˈvækjuəm] [ˈvækjuːm] 
US 名真空, 真空吸尘器 维真空
- 真空是一種不存在任何物質的空間狀態，是一種物理現象。在真空中，聲波因為沒有介質而無法傳遞，但電磁波的傳遞不受真空的影響。粗略地說，真空是指在一區域之內的氣壓遠遠小於大氣壓力。真空常用帕斯卡（Pascal）或托爾（Torr）做為壓力的單位。
- 真空下的氣壓為零，有些情形下，氣壓小於大氣壓力，但不為零，此時稱為局部真空，有些也簡稱為真空。
- 在局部真空的情形下，若其他條件不變，氣壓越低，表示越接近真空。例如一般的吸塵器的吸力可以使氣壓降低20%。也可以以產生更接近真空的條件，像化學、物理及工程常見的超高真空腔體，其氣壓可以到大氣壓力的10−12，粒子密度為100粒子/cm3，對應約100粒子/cm3。
FR vacuum 
- 名词 (Noun)PLvacuumsPLvacua
- A region of space that contains no matter.
- A vacuum cleaner.
- 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
- A region of space that contains no matter.
- 动词 (Verb)SGvacuumsPRvacuumingPT, PPvacuumed
- (transitive) To clean (something) with a vacuum cleaner.
- (intransitive) To use a vacuum cleaner.
- (transitive) To clean (something) with a vacuum cleaner.
- 更多范例
- 用于句中
- She's good enough at fixing vacuum cleaners that she should hang out her shingle and try making some money at it.
- THIS has big savings on top brands of whitegoods, televisions, vacuum cleaners and most major appliances.
- Electrophoresis was performed for 90 min at 120 V. The gel was vacuum dried and then exposed to a phosphoscreen for 45 min.
- 用于句中
Definition of vacuum in English Dictionary
- 词类阶层 (Part-of-Speech Hierarchy)
- 名词
- 可数名词
- 可数名词
- 动词
- 不及物动词
- 及物动词
- 不及物动词
- 名词
资料来源: 维基词典
在语法上，这个单字"vacuum"是一个名词，更具体地来说，是一个可数名词。它同时也是一个动词，更具体地来说，是一个不及物动词和一个及物动词。