您要找的是不是：
谷沉
以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译
[地质]?谷中穴
... 谷中谷 valley-in-valley 谷中穴 valley sink 骨层 bone bed ...
In desperation, they are also depleting their own groundwater, causing the entire valley floor to sink and possibly making the aqueducts geologically unsafe.
ECONOMIST: Water in California
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