Slab cooling resulted in higher oxygen content in the root environment, which improved root activity.

基质条冷却可提高根基氧含量，这有利于提高根系活力。

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The high oxygen content reduces carbon monoxide levels by 25 - 30 percent, according to United State Environment Protection Agency.

根据美国环保局资料，高含氧量可以减少25%-30%一氧化碳生成量。

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The present invention relates to chemical and environment protection technology, and is especially gradient magnetic field process and apparatus for raising content of oxygen dissolved in water.

本发明公开了属于化工环保技术领域的一种通过梯度磁场提高水中溶解氧含量的方法及装置。

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The hose is connected to a machine that lowers the air's oxygen content, thereby simulating a mountaintop environment.

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Stray-Gundersen worked for the Norwegian Olympic Committee from 1997-2002, sealing bedrooms of the country's top Nordic athletes and adjusting the oxygen and nitrogen content of the air, so they could sleep in a simulated high altitude environment (he was the scientist who developed the concept of living at high altitude to increase hemoglobin levels).

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