单词	nitrogen {n
释义	同 7}--nitrogen {N
随便看	self-objectification self observation self-observation self observation generalization self observation technique self-observation technique self-obsessed self-obsession self-occupied selfoc lenses self-oil-cooling self-oiler self oiling self-oiling selfoiling self-oiling bearing selfoiling bearing self-oligomerization self open self-opening die head self-operated control self operated controller self-operated controller self-operated regulator self-operating