Unverified80% confidenceTradeoffTime unknown
硅胶指环比塑料硬指环更适合初学者:柔软材质包裹手指减少压痕和不适感,但硅胶指环耐用性差易老化变黄,1年左右需更换;纯硬塑料指环耐用但初期孩子抗拒感强
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80%
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