To get a feel for what this would mean, bear in mind that the amount of oxygen in a given volume of air changes with atmospheric pressure, and the local pressure changes with the weather.

要了解这将意味着什么？给定体积的空气中的含氧量是随着大气压变化而变化的，而当地的气压又是随天气变化的。

youdao

Next is what they call a bladder of oxygen that's an inflatable sac, filled with oxygen, to simulate atmospheric pressure.

下一个我们讲的是氧气气囊是一种可充气的气囊，为了模仿大气压力。

youdao

Inhalation of pure oxygen at atmospheric pressure or less can cause pulmonary irritation and edema after 24 hours.

在大气压或更低气压下吸入纯氧，24小时后会导致肺刺激和水肿。

youdao

At higher altitudes, where atmospheric pressure is lower, oxygen enters the body less readily, leading to the hypoxic state.

WSJ: Mayo Clinic Researchers on Everest Study High Altitude's Effects on the Body

The chamber is pressurized with pure oxygen, and the pressure inside the chamber will slowly rise to about two and a half times normal atmospheric pressure.

CNN: Gangrene