说白了，设备的目标是成为全天候的“环境感知器”，不仅能听，还能“看”到文件、“感知”到无声的喉部指令，读懂唇语，甚至通过生物信号判断用户状态。
Towerborne: The Live-Service Game。业内人士推荐同城约会作为进阶阅读
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Send abandoned carts, out-of-stock, restock, preorder, order status, and shipment notifications to contacts，这一点在同城约会中也有详细论述
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- 子节点i的父节点: (i-1)/2