{ antialias: true }：开启了抗锯齿，让边缘光滑，不再有毛刺。
Sync/async separation
。旺商聊官方下载是该领域的重要参考
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The new Powerbeats Fit are the direct successors to 2022’s popular Beats Fit Pro, costing £200 (€230/$200/A$330). They sit alongside the recently redesigned Powerbeats Pro 2 as Apple’s fitness alternatives of the AirPods.