常見(jiàn)例句An effective system uses fuel that ignites easily, burns as smokelessly as possible. 有效的加熱系統(tǒng)所用的燃料必須易于引火，燃燒時(shí)盡可能無(wú)煙。33. An effective system uses fuel that ignites easily, burns as smokelessly as possible. 有效的加熱系統(tǒng)所用的燃料必須易于引火，燃燒時(shí)盡可能無(wú)煙。 返回 smokelessly