[KongchangAI]
Unverified75% confidenceTradeoffTime unknown

游戏趣味性与知识密度存在权衡:包装/动画过重的产品,孩子真正接触数学内容的时间可能不足总时长的30%,选购时优先看单位时间的有效练习题量

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75%
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Long-term
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