fossil fuel – n. a fuel, such as coal, oil, or natural gas, that is formed in the earth from dead plants or animals

source – n. where something comes from

emission – n. the act of producing or sending out something (such as energy or gas) from a source

capacity – n. the largest amount of something that can be held in a container, building, etc.
 2/3   首页 上一页 1 2 3 下一页 尾页