1·Natural gas and coal—also fossil fuels—have similarly seen price declines that look to be long-lived.
天然气和煤炭,还有化石燃料,也出现了类似的价格下跌,而且看起来会持续很长时间。
2·More than half of all U.S. households are heated with natural gas.
超过半数的美国家庭用天然气供暖。
—— 《柯林斯英汉双解大词典》
3·Because oil and natural gas became scarce?
因为石油和天然气变得稀缺了,是吗?
4·The amount of oil and natural gas in the Earth was still plentiful.
地球上的石油和天然气储量仍然丰富。
5·Well, there were other energy choices like oil and natural gas, right?
因为还有类似石油和天然气这种其他的资源可供选择,对吗?