| 例句 |
He asserted that nuclear power was a safe and non-polluting energy source.他断言核能是安全、无污染的能源。What's the alibi for not developing a nonpollutant steam engine for cars?不去研制一种供汽车用的无污染蒸汽发动机的借口是什么?Civil aircraft engines must be quiet, non-polluting, reliable and long-lasting.民用飞机的发动机必须噪音低、无污染、可靠、耐用。Electric cars are quiet and pollution-free.电车噪声小，而且无污染。People would benefit greatly from a pollution-free vehicle.人们会从无污染车辆中获益良多。Environmentally friendly energy sources include water and wind power.对环境无污染的能源包括水能和风能。 |