Definition
天然气 (tiān rán qì) specifically refers to natural gas, a naturally occurring fossil fuel. Its sibling 燃气 (rán qì) is a broader term covering any gas used as fuel (natural gas, coal gas, liquefied petroleum gas, etc.). Use 天然气 when you mean the specific natural resource; use 燃气 when talking about gas fuel in general.
noun
natural gas
Examples
- 天然气。Zhège dìqū de jūmín dōu shǐyòng tiān rán qì.The residents of this area all use natural gas.
- 天然气。tiān rán qì de jiàgé zuìjìn zhǎng le bù shǎo.The price of natural gas has risen quite a bit recently.
- 天然气。Hěnduō jiātíng dōu yòng tiān rán qì qǔ nuǎn.Many families use natural gas for heating.
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