氧的用法和样例：
例句
-
大气中如果没有氧和氮，人就无法生存于地球了。
If it were not for oxygen and nitrogen in the air, no man could live on the earth. -
水含有氢和氧。
Water contains hydrogen and oxygen. -
两个氢原子和一个氧原子结合而成一个水分子。
Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water. -
她因缺氧而死。
She died from lack of oxygen. -
山顶上缺氧。
There was a shortage of oxygen at the top of the mountain. -
氢和氧是气体。
Hydrogen and oxygen are gases. -
植物可以吸收二氧化碳释放氧气。
Plants can absorb carbon dioxide and release oxygen. -
水由氢和氧组成。
Water is composed of hydrogen and oxygen.
