They burn through it quickly, lowering the oxygen partial pressure around them to about 40 millimeters.

它们迅速燃烧，将周围的氧分压降低到大约 40 毫米。

To function normally, humans need an oxygen partial pressure of at least 16 kilopascals.

为了正常运作，人类需要至少16千帕的氧分压。

That makes the oxygen partial pressure in your plasma drop, so your hemoglobin starts to give up more of its oxygen to the plasma.

这使得血浆中的氧分压下降，所以你的血红蛋白开始向血浆释放更多的氧。

And in the blood that's entering your lungs — after most of its oxygen has been stripped away by your hungry muscles and neurons — the oxygen partial pressure is only about 40 millimeters.

在进入你肺部的血液中——在大部分氧气被饥饿的肌肉和神经元吸收后——氧气分压只有大约 40 毫米。

The x-axis illustrates increasing oxygen partial pressure, where the PO2 in the lungs is about 100 mmHg and the PO2 in the tissues is about 40 mmHg.

x轴显示氧分压增加，肺中的PO2约为100 mmHg，组织中的PO2约为40 mmHg。

By the time the blood leaves the lungs, each hemoglobin is fully saturated, the oxygen partial pressure in your plasma is about 100 millimeters, and now it is ready to be delivered to where it is needed most.

当血液离开肺部时，每种血红蛋白都完全饱和，血浆中的氧分压约为 100 毫米，现在它已经准备好被送到最需要的地方。