oxygen
/ˈɔksɪdʒən; `ɑksədʒən/ n[U]
chemical element, a gas without colour, taste or smell, present in the air and necessary for all forms of life on earth氧; 氧气
There was a shortage of oxygen at the top of the mountain. 该山顶上缺氧.
She died from lack of oxygen. 她缺氧致死. =>App 10 见附录10.