Because we breathe in air pollution, we may think that it only affects the human breathing system.

由于我们吸入了污染空气，我们可能会认为受影响的只有人类呼吸系统。

So, it's part of your " breathing system, " you might call it.

所以，它是你“呼吸系统”的一部分，你可以这样称呼它。

Endothermy evolved at a time when important elements of the mammal body plan were falling into place, including changes to the backbone, breathing system, and hearing system.

哺乳动物在其身体的重要组成部分（包括脊骨、呼吸系统和听力系统的变化）已经形成的时候进化成了温血动物。

The crew survival engineering team works on emergency equipment like life rafts, breathing systems, protective suits, even the diapers astronauts would put on during a catastrophic event.

机组救生工程团队负责应急设备， 如救生筏、呼吸系统、 防护服，甚至宇航员在灾难性事件中穿上的尿布。