洪水期间，山顶农舍成了村民寻求高地的避难堡垒。
During the floods, the hilltop farmhouse became a fastness for the villagers seeking higher ground.
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解释
fastness 在此为比喻用法，指自然灾害中提供庇护的坚固避难点。
During the floods, the hilltop farmhouse became a fastness for the villagers seeking higher ground.
fastness 在此为比喻用法，指自然灾害中提供庇护的坚固避难点。