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It does this by increasing the flow of blood and oxygen to the necessary muscles.
這是通過增加向必要部位肌肉輸送血液和氧氣來實現的。
The same applies to humans.
同樣的情況也適用于人類。
Even when we experience emotions such as grief or sorrow, the autonomic nervous system responds as it would to anger or fear by increasing the flow of oxygen through the body.
即使我們經歷悲傷或失落這類情緒時，自主神經系統也會像應對憤怒和恐懼情緒般，增加身體的氧氣流量。
To increase oxygen intake, the autonomic nervous system makes us breath faster, and expands the glottis, the opening in the throat that allows air to flow from the larynx to the lungs.
為了增加氧氣的攝入量，自主神經系統促使我們的呼吸加快，同時使喉嚨的聲門擴張，讓空氣從喉道涌向肺部。
The expansion of the glottis in and of itself does not create a lumpy feeling, until we try to swallow.
除非進行吞咽動作，否則聲門本身擴張不會讓人出現哽咽。
Since swallowing involves closing the glottis, this works against the muscles that open the glottis inresponse to crying.
因為吞咽涉及到閉合聲門，這與哭泣時開啟聲門的肌肉相應動作相反。
We experience the resulting muscle tension as a lump in the throat.
這時我們感覺到肌肉緊張，也就是喉嚨哽咽的感覺。
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