// ⚠️ 易错点3：此处返回n而非0（完全有序无需排序，长度为0）
An AI agent coding skeptic tries AI agent coding, in excessive detailFebruary 27, 2026 · 33 min
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Allard also notes that "Both the Buds4 and Buds4 Pro will feature smaller earbud heads, with the intention of providing more comfortable all-day wear." On top of that, the Pro models also feature Adaptive Active Noise Cancellation 2.0 for keeping outside noises quiet and a battery life that lasts up to 26 hours using ANC (with the charging case's help), or up to 30 hours without ANC.