prisons
牢笼（ prison 的复数）
监狱（ prison 的复数）
例句
The prisons are all full up.
所有的监狱都已满。
《柯林斯英汉双解大词典》
We were horrified at the conditions prevailing in local prisons.
地方监狱的普遍状况让我们震惊。
《牛津词典》
The fund has been used largely to finance the construction of federal prisons.
该基金大部分已用于资助联邦监狱的建造。
