护手霜adb
氧气oxygen臭氧由氧气和紫外线发生反应而产生。Ozone is produced by the reaction between oxygen and ultraviolet light.火箭中的爆炸性混合物由燃料和氧气构成。The explosive mixture in a rocket consists of both a fuel and a supply of oxygen.
Greta：）杨婷
oxygen英 [ˈɒksɪdʒən] 美 [ˈɑ:ksɪdʒən] n.[化]氧，氧气Water contains hydrogen and oxygen. 水含有氢和氧。Ozone is produced by the reaction between oxygen and ultraviolet light. 臭氧由氧气和紫外线发生反应而产生。
