常見例句No machine can work without a fuel such as coal or oil.沒有像煤或石油這種燃料，任何機(jī)器都不能運(yùn)轉(zhuǎn)。Besides coal,the most important natural fuel are gas and oil.除了煤，最重要的天然燃料是煤氣和石油。 返回 non-fuel