sink·hole 
(sĭngkhōl′)
(sĭngkhōl′)n.
A natural depression formed by the undermining or sudden collapse of the land surface, often as a result of groundwater enlarging cavities in underlying limestone or other easily soluble bedrock.
| 单词 | sinkhole |
| 释义 | sink·hole (sĭngkhōl′)n. A natural depression formed by the undermining or sudden collapse of the land surface, often as a result of groundwater enlarging cavities in underlying limestone or other easily soluble bedrock. |
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