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词汇 permanent air
释义

Definition of permanent air in English:

permanent air

noun
historical

  • A gas which cannot be readily liquefied, as contrasted with a vapour, which can.

Origin

Mid 17th century; earliest use found in Robert Boyle (1627–1691), natural philosopher.

Definition of permanent air in US English:

permanent air

noun
historical

  • A gas which cannot be readily liquefied, as contrasted with a vapour, which can.

Origin

Mid 17th century; earliest use found in Robert Boyle (1627–1691), natural philosopher.
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