Intrapulmonary pressure falls below atmospheric pressure when the diaphragm contracts and increases the thoracic volume.

当缩并增加胸腔容积时，肺内降至大气以下。

And he measures comfort in part based on the pressure drop of air entering the mask—basically, how hard it is to breathe.

他对舒适度的测量部分基于空气进入口罩的降——也就是戴口罩时呼吸的难易程度。

Thanks to Ohm’s law, you can substitute the voltage drop across each resistor with the current times the resistance.

多亏了欧姆定律， 您可以用电流乘以电阻来代替每个电阻器上的降。

And the drop across resistor 1 in the same loop would be the resistance, 40 Ohms, times the current through the resistor, which is 0.375 Amperes.

一环路中电阻 1 上的降将是电阻 40 欧姆乘以通过电阻的电流，即 0。375 安培。

Now, you know that any two resistors in parallel have the same voltage drop, so both the 17 Ohm resistor and the 7.88 Ohm resistor have a voltage drop of 7 Volts, just when they were collapsed into one.

现在您知道两个并联运行的电阻器具有相的降，因此 17 欧姆电阻器和 7。88 欧姆电阻器在折叠成一个时都有 7 伏的降。