常見例句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，燃燒時盡可能無煙。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，燃燒時盡可能無煙。 返回 smokelessly