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fire-damp (n.)
[fire-damp 词源字典]
"marsh gas," 1670s, from
fire
(n.) +
damp
(n.) "noxious vapor." Largely methane, it can spontaneously ignite when mixed with atmospheric air.
[fire-damp etymology, fire-damp origin, 英语词源]
[fire-damp 词源字典]