尽管呼吸作用急剧下降，血液氧含量却与之前并无二致。这表明老鼠全身的脏器都没有出现缺氧。
In spite of reduced respiration, oxygen levels in the blood of the mice did not change, suggesting that no part of the body was at risk of being starved of oxygen.
在低氧的高海拔地区，你必须多呼吸，而渴酒会让你缺氧的可能性提高。
Since you need to breathe more to compensate for low oxygen at high altitudes, drinking could make you more likely to experience hypoxia.
每当我们呼吸缺氧时，就会给我们大脑发出警报，这会提升应激激素水平，告诉心脏更加努力工作。
MICHAEL TWERY: "Whenever we run out of enough air to breathe, it sends alerting signals to our minds." It raises the level of stress hormones. It tells our heart to work harder.
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