Many cities in Europe still have walls left over from an earlier era. I have been to the walls in Tallinn, Estonia, and Valetta, Malta, which is particularly impressive as you approach the harbor from the sea. These walls were built to keep out invading armies, but they also kept out bandits and small bands of marauders. Inside the walls, the residents were relatively safe.

中文翻译：

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我们的封闭式社区

欧洲的许多城市仍然保留着早期时代遗留下来的城墙。我去过爱沙尼亚的塔林和马耳他的瓦莱塔的城墙，当你从海里接近海港时，印象特别深刻。这些城墙是为了抵御入侵的军队而建造的，但它们也阻止了土匪和小规模的掠夺者。在围墙内，居民相对安全。