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tomo
It's the deepest limestone cave in the U.S.
它是美国最深的石灰岩洞穴。
youdao
It was formed as a limestone cave during the glacial period.
它是于冰河时期形成的石灰岩洞。
This natural limestone cave is called the "Cave for the Mountain God".
这个天然形成的溶洞被称为“山神洞”。
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