oxygen
英 ['?ks?d?(?)n]
美['ɑks?d??n]
- n. [化學(xué)] 氧氣，[化學(xué)] 氧
英英釋意
- 1. a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust