四步口诀：倒着来 → 弹 ≤ 当前的 → 栈顶即答案 → 当前入栈。
各国加速推进的“数据本地化”存储与“主权算力”战略，迫使科技公司进行昂贵且重复的分布式基础设施投资，以满足数据不出境的政治要求。
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This week, Ofgem said the price cap in Great Britain would drop by 7% from April. This usually only matters if you are on a default tariff, but this time the reduction applies to everyone because the government is removing green charges from bills.，详情可参考51吃瓜
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