笛子循环换气呼吸技法的产生，解决了这一难题。
The invention of cyclical breathing method solves the problem.
人们往往会屏住呼吸，或吸入过多的氧气或换气过度。
People often hold their breath, or take in too much oxygen and hyperventilate.
安娜·贝利呼吸太快了，以至于茱莉亚觉得她得了过度换气症。
She was breathing so fast that Julia thought she was hyperventilating.
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