oxygen

n.氧, 氧气

own brand, own goal, owner, owner-driver, owner-occupied, owner-occupier, ownerless, ownership, ox, ox-eye, Oxbridge, Oxfam, Oxford, oxidation, oxide, oxidize, oxidize, oxidise, Oxon, oxtail, oxy-acetylene, oxygen mask, oxygen tent, oxygenate, oxymoron, oyez, oyster, oyster bed, oyster-catcher, oz, ozone, ozone layer, P, P and O, p and p, P, p, p.a. system, p.m., P.M./p.m., pa, pace,