4 篇文章
Each year explorers chart over a hundred miles of new cave passages.
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Each year explorers chart over a hundred miles of new cave passages. 每年 探险家们都会测绘 上百英里新的洞穴通道

these commuters rely on their loud clicks to find their way through the cave passages in total darkness.
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these commuters rely on their loud clicks to find their way through the cave passages in total darkness. 这些住客利用它们响亮的叫声 在漆黑一片的洞穴通道内辨别方向

creating a maze of caverns and passages
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creating a maze of caverns and passages 形成了迷宫般的溶洞和通道

Beneath our feet are countless miles of cave shafts and passages.
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Beneath our feet are countless miles of cave shafts and passages. 我们脚下有着绵延不绝的洞窟和隧道

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