primary oxygen
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美
- 主系统用氧
双语例句
- Oxygen bome calorimeter was used to determine calorific value of vinasse.
用氧弹直接测定糖厂废醪液的发热量。 - As the atmosphere slowly became rich in oxygen, life changed to take advantage of oxygen as a source of energy.
随着大气中氧慢慢地增多，生命也就变得喜欢用氧作为自己的能源。
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