hole，cave，caving，cavity，hollow ；

[例句] 大老鼠把那些面粉袋嗑出了窟窿. The rats have eaten holes in those bags of flour.

[例句] 最后我把这件旧外套的肘部磨出了窟窿. I've worn through the elbow of this old coat at last.

slum，the back slums，[法] gutter，bustee，rookery ；

[例句] 贫困产生了贫民窟，那里不仅有碍观瞻，而且卫生隐患严重。 Poverty leads to slums, which are an eyesore and a health hazard.

[例句] 贫民窟要被炸掉了。 The slum is to be dynamited.

latibulum ；

catacomb ；

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