[KongchangAI]
Unverified75% confidenceTradeoffTime unknown

场景多样性与难度分级往往矛盾:主打丰富场景的大套卡多按主题分类(水果/动物/交通)而非语言难度分级,主打分级的产品场景数量常偏少,学龄前重表达训练应优先分级

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