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marsh gas ['mɑ:ʃgæs]
agric. 甲烷 (CH₄)
ecol. 生物气
met. 沼气; 甲烷
marsh-gas
gen. 沼气; 甲烷
marsh gas
: 7 phrases in 5 subjects
Earth sciences1
Electric machinery1
General1
Oil / petroleum1
Technology3