除非你愿意修个堡垒要塞，否则私人岛屿的风险比较高。
Unless you want to build a small fortress, private islands are risky spots.
要塞构筑了堡垒的地方，尤指大的、永久性的军事驻地，常包括一个城镇。
A fortified place, especially a large, permanent military stronghold that often includes a town.
要塞构筑了堡垒的地方，尤指大的、永久性的军事驻地，常包括一个城镇。
A fortified place, especially a large, permanent military stronghold that often includes a town.
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