Ozone is a highly reactive form of oxygen gas.
臭氧是一种非常活跃的氧气形态。
Ozone is produced by the reaction between oxygen and ultra-violet light.
臭氧由氧气和紫外线发生反应而产生。
Supplementary oxygen is rarely needed in pressurized aircraft.
密封的飞机内很少需要补充氧气。
They loaded themselves with food, medical supplies, and oxygen equipment.
他们携带了食物 、 医疗器具和氧气设备.
Coke burns with oxygen to give carbon dioxide.
焦碳用氧气燃烧,产生二氧化碳.
Fish take in oxygen through their gills.
鱼用鳃吸氧气.
Red blood cells transport oxygen through the bloodstream.
红细胞通过血液循环输送氧气.
If headaches only occur at night, lack of fresh air and oxygen is often the cause.
如果只是在晚上头疼，那常常是由于缺乏新鲜空气和氧气的缘故。
Blood is the medium in which oxygen is carried to all parts of the body.
血液是将氧气输送到人体各个部位的媒介。
Plants and trees filter carbon dioxide out of the air and produce oxygen.
花草树木会过滤掉空气中的二氧化碳并制造氧气。
All the cells and tissues in the body benefit from the increased intake of oxygen.
体内所有的细胞与组织都从增加的氧气吸入量中受益。
The shell has to be slightly porous to enable oxygen to pass in.
外壳不得不有些细小的孔以便能使氧气通过.
The action of heat will separate the chemical into a substance and oxygen.
热的作用会把这化学药品分解成氧气和另一种物质.
It is bacteria that have generated the oxygen we breathe on earth.
正是细菌生产出我们在地球上呼吸的氧气.
Blood is the medium in which oxygen is carried to all parts of the body.
血液是将氧气输送到人体各个部位的媒介。