大家都搜：
关键因子
1、Although present in minute concentrations in Earth's atmosphere, nitrous oxide is a highly potent greenhouse gas and is becoming a keyfactor in stratospheric ozone destruction.───虽然在地球大气层中的浓度甚微，一氧化二氮是一种很强的温室气体，而且正成为PoHuai平流层臭氧的主因。