Do we really know the mountain well when we are not acquainted with the cavern?

在我们还没有认识山洞时，我们能说已经认清山了吗？

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When he reached the entrance of the cavern, he pronounced the words, "Open, Sesame!"

当他来到了山洞的入口，他念动了咒语。“打开，芝麻！”

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During off-peak times, electricity runs a compressor which pumps the air down into the cavern.

在非高峰期，电力驱动一台压缩机，将空气泵入到洞穴中。

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But Jim White made it his life's work to make sure the public would see and enjoy the cavern.

VOA: special.2009.12.07

A few years later, a settler named Abijah Long also found the entrance and went into the cavern.

VOA: special.2009.12.07

The Big Room and other parts of the cavern contain huge, sharp formations of minerals.

VOA: special.2009.12.07

The disc is the 57th added to the wall, close to the original site of the Cavern Club.

BBC: Sir Paul McCartney

In some cases, sunlight shines through holes in the cavern ceiling, illuminating the beautifully clear, blue-tinted water giving it an otherworldly feel.

CNN: 3 undeniable reasons to explore Mexico

Long ago, the first traveller who stumbled into the cavern deceived the next one, who in turn deceived another traveller, and so on.

NEWYORKER: Sweetheart Sorrow