It is produced from the burning of fossil fuels (coal and oil) and the smelting of mineral ores that contain sulfur.
它源自矿物燃料(煤和石油)的燃烧以及对含有硫磺的矿物的冶炼。
2
When the food ran out, they subsisted on lamp oil and sulfur-tainted water until their eventual rescue.
当食物耗尽时，他们就靠喝灯油以及被硫磺污染过的水苦苦支撑，最终成功获救。
3
Under the new rule, by 2015, existing boilers must switch from No. 6 oil to a low-sulfur version of the No. 4 heating oil or to an equivalent cleaner fuel.