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在被9.11恐怖袭击的美国世贸中心遗址地下,地质学家最近发现了2万年前的坑洞,坑洞内还有壮观的地下悬崖,也就是科学家所说的“壶穴”。
Geologists recently discovered 20,000-year-old potholes beneath the site of the United States World Trade Center that was hit by the September 11 terrorist attacks. There are also spectacular underground cliffs in the pits, which scientists call “potholes.”