名词
中文翻译：被围困的区域
同义词：
['enclosed area', 'confined area']
例句：
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1.The army had to impound the area around the castle for safety reasons.
军队为了安全原因不得不将城堡周围的区域围起来。
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2. The prisoner was impounded in a small room with no windows.
这名囚犯被关在一个没有窗户的小房间里。
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3.The mine was sealed off and the miners were impounded in the underground bunker.
矿井被封锁了，矿工们被关在地下的掩体里。