vacuum

核心释义

the absence of matter; a region that is devoid of matter; an electrical home appliance that cleans by suction

1. 1.

   不含物质的空间区域。

   A region of space that contains no matter.

2. 2.

   在容器中,如蒸汽机的冷凝器中,空气或蒸汽几乎被抽空,压力低于大气压的状态。

   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.

3. 3.

   具有零张量的时空。

   A spacetime having tensors of zero magnitude.

4. 4.

   量子场或局部时空的基态,或更抽象地说,系统的最低能量状态。

   A ground state of a quantum field or of local spacetime, or more abstractly the lowest-energy state of a system.

5. 5.

   因失去亲近的人或职业而在生活中产生的空虚。

   An emptiness in life created by a loss of a person who was close, or of an occupation.

6. 6.

   一种将腹部向脊柱方向收紧的锻炼。

   An exercise in which one draws their abdomen towards the spine.

不含物质的空间区域。；在容器中,如蒸汽机的冷凝器中,空气或蒸汽几乎被抽空,压力低于大气压的状态。；具有零张量的时空。；量子场或局部时空的基态,或更抽象地说,系统的最低能量状态。；因失去亲近的人或职业而在生活中产生的空虚。