| 单词 | permanent air |
| 释义 | Definition of permanent air in English:permanent airnoun historical
OriginMid 17th century; earliest use found in Robert Boyle (1627–1691), natural philosopher. Definition of permanent air in US English:permanent airnoun historical
OriginMid 17th century; earliest use found in Robert Boyle (1627–1691), natural philosopher. |
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