柯林斯詞典carbon monoxide /?kɑ?b?n m??n?ksa?d/ 1. N-UNCOUNT Carbon monoxide is a poisonous gas that is produced especially by the engines of vehicles. 一氧化碳 The limit for carbon monoxide is 4.5 per cent of the exhaust gas. 尾氣中一氧化碳的排放量限制在4.5% 以下。 返回 carbon monoxide劍橋詞典the poisonous gas formed by the burning of carbon , especially in the form of car fuel 一氧化碳（尤指汽車尾氣） 返回 carbon monoxide