Unverified85% confidenceTradeoffTime unknown
缓冲越厚防摔越好但越笨重限制活动，膝盖灵活性和保护是矛盾：日常防摔选5mm薄款兼顾活动，只有轮滑等真正会摔的运动才上厚硬壳
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85%
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Long-term
Relevance
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