The bronchi supply air and pulmonary arteriessupply blood to the lungs. Together they take in air from theatmosphere, oxygenate the blood, and excrete the carbon dioxide backout of the body.

由支气管供应空气，而肺动脉完成对肺部的供血，它们俩协同工作将将空气中的氧气溶入血液，并将二氧化碳排出体外。

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Previously, MTBE (methyl tertiary-butyl ether) was the oxygenate of choice, but fell out of favour in 2004 when it was found to contaminate ground water.

以前，MTBE（甲基叔丁基醚）曾作为汽油充氧剂，但是，在2004年，人们发现它污染了地下水，所以就不再使用它了。

youdao

Previously, MTBE (methyl tertiary - butyl ether) was the oxygenate of choice, but fell out of favour in 2004 when it was found to contaminate ground water.

以前广泛使用的增氧剂是甲基叔丁基醚，后来有研究发现甲基叔丁基醚会污染地下水，因此在2004年久停止使用了。

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Ethanol, added to motor fuel, is a great oxygenate and can stretch gasoline supplies blended from 10 to 85 percent by volume.

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