如果没有这种肌肉运动，吸气就像从气球里吸出空气一样——狭窄的通道往往会坍塌。

Without this muscular action, inhaling is like sucking air out of a balloon—the narrow passages tend to collapse.

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呼吸时胸部肌肉使胸廓扩大让空气吸入肺部。

In breathing the chest muscles expand the rib cage and allow air to be sucked into the lungs.

《牛津词典》

但是电解液会挥发，因此当这种肌肉暴露在空气中时就会干涸。

But the electrolyte can evaporate, causing the muscle to dry out when exposed to the air.

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