Unverified80% confidenceTradeoffTime unknown
削尖越锋利书写越流畅但笔尖越易断、损耗越快；儿童日常书写选中等偏钝的笔尖更耐用，绘画才需要极尖
1
Sources
80%
Confidence
Long-term
Relevance
-
First Seen
Sources
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