微软表示，一块 120mm 见方、2mm 厚的硅酸硼玻璃可存储约 4.8TB 数据，相当于约 200 万本印刷书籍的内容。团队在加速老化实验中推算，在 290℃ 条件下数据可保存 1 万年以上，而在室温下寿命将更长。
正是基于需求扩容的预期、政策逐步松动、制造能力已然成熟三个因素，刘强东选择果断入场。
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location: ${location name},
The simplest approach is to check every single point. Compute the distance from the user's location to every restaurant in the database, keep the ones that are close enough, and throw away the rest.