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학습 통계
CEFR 레벨
난이도
자막 (77 세그먼트)
Isn’t it odd that, when something’s funny,
you might show your teeth, change your breathing,
become weak and achy in some places, and maybe even cry?
In other words, why do we do this bizarre thing that is laughter?
When you laugh, your abdominal muscles contract rapidly.
This alters your breathing patterns,
increasing the pressure in your chest cavity, and pushing air out,
which might audibly emerge as a snort, wheeze, or vocalization.
Because you’re exerting your abdominal muscles much more
than you usually would while talking,
they may start to hurt.
Laughter also inhibits your reflexes and muscle control,
causing sensations like leg weakness.
So, where does this funny phenomenon come from?
Because there’s no archaeological record of laughter,
it’s impossible to say exactly how and why it evolved,
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