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vacuum

B1 noun

Các nghĩa

  1. chân không

    A region of space that contains no matter.

  2. chân không

    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

  3. không-thời gian chân không

    A spacetime having tensors of zero magnitude.

  4. trạng thái chân không

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

  5. mô tả không-thời gian chân không

    A description of spacetime resulting from a particular compactification of spatial dimensions.

  6. khoảng trống

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

    Henrietta soon found a terrible vacuum left, by the letters in which she used to pour forth every feeling and thought to her uncle.

  7. bài tập hóp bụng

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

    Abs show up in a most-muscular shot, a vacuum shot, the hands-behind-head compulsory ab shot, twisting poses, and so on.

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