jreibun/1739/1
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自転車で坂を
- くだ下る 時、ブレーキをかけないと
- かそくどてき加速度的 にスピードが増すので、大変危険だ。
When riding a bicycle downhill, failing to apply the brakes will cause your speed to increase exponentially, making it extremely dangerous.
— Jreibun
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