出典:Wikipedia
出典:『Wikipedia』 (2011/07/19 18:09 UTC 版)
Natural gas is a gas consisting primarily of methane, typically with 0–20% higher hydrocarbons (primarily ethane). It is found associated with other hydrocarbon fuel, in coal beds, as methane clathrates, and is an important fuel source and a major feedstock for fertilizers.
natural gas
deliver natural gas
a combustible gas called natural gas
natural gas resources
固形燃料.
a region from which natural gas is obtained
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