exercise that increases the need for oxygen.
增加氧气需要量的练习。
The oxygen content in the vent pipe of the equipment has to be checked for the concentration of O2 to get the required amount of Nitrogen.
需要检查设备放空管线中氧气的浓度，来确定所需要的氮气的量。
life sustained in the presence of air or oxygen.
需要空气或氧气的生活。
Earth people need oxygen to breathe.
地球人需要氧气来呼吸，
We need oxygen to support life.
我们需要氧气维持生命。
It is mainly applied to increasing oxygen content in fishpond, so as to provide sufficient oxygen required by fish growing.
主要用于增加鱼池水中含氧量，满足鱼类生长发育所需的氧气。
It is the ideal companion in a great number of applications where reliable monitoring of Oxygen, toxic and combustibles gases and vapors in the ambient air is necessary.
这个仪器可以理想的用于大量的在环境空气里需要检测氧气，毒气和蒸气的场合。
To require air in the combustion process.Used of an internal - combustion engine.
进气氧化过程中需要空气。用于内燃机
Oxygen to support combustion is provided from a cylinder.
燃烧需要的氧气由气瓶来提供。
Fish and other aquatic life need oxygen, and the amount of dissolved oxygen in a water body therefore is one of the best measures of its ecological health.
鱼和其他水生物生存需要氧气，水体中的溶氧量是衡量水体生态健康最好的标准之—。
"Cells need the oxygen in air to break down foods and release energy. Carbon dioxide forms as a waste product when foods, are broken down."
细胞需要空气中的氧分解食物、释放能量。食物分解后，形成了废物二氧化碳。
As is known to us all, the burning of any fuel requires oxygen.
众所周知，任何燃料的燃烧都需要氧气。
Fresh air gives you the oxygen you need. all the ceils of the body must have oxygen. They use it to change food into energy.
新鲜空气为人们提供所需要的氧气。身体全部细胞都需要氧气。细胞利用氧把食物变成能。
An organism, such as a bacterium, requiring oxygen to live.
好氧菌需要氧气生存的有机体，例如细菌
an organism esp. a bacterium that does not require air or free oxygen to live.
不需要空气或氧气生存的有机体特别是细菌。
The key pollution indicators are ammonia nitrogen and BOD.
主要污染指标是氨氮和生化需氧量。
The quantities, which must be measured in the laboratory prior to recombination, are briefly enumerated.
需要在实验室测量的油气需要在再混合前将油气的量概算出来。
Chemical Oxygen Demand--Total [CODt]
化学需氧量（总数）