coalbed methane
A little loop.
The rank or office of an ephor. / The body of ephors collectively.
natural gas extracted from an underground coal formation
(Britain, labor union) Abbreviation of Association of Scientific Workers.
研究者たちは、地下の石炭層から採取される天然ガスの開発が地域の水質に与える環境影響を調査した。
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