shaft

2 篇文章
This is the biggest cave shaft in the world.
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This is the biggest cave shaft in the world. 这是世界上最大的深洞

cave shaft biggest is in world the this
A moulin - a shaft in the ice opened by melt water as it plunges into the depths of the glacier.
Walden 21
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19 0 1

A moulin - a shaft in the ice opened by melt water as it plunges into the depths of the glacier. 冰川瓯穴——由冰融水凿成的 直达冰川深处的圆筒状竖井

glacier depths plunges opened shaft moulin ice melt into it water of in as the by a
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