名词
中文翻译：珀西石灰石
同义词：
['permian limestone', 'chert例句：1. The ancient city of Percy lies on the edge of a vast desert.（珀西古城位于一片广阔的沙漠边缘。）']
例句：
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1. The ancient city of Percy lies on the edge of a vast desert.
珀西古城位于一片广阔的沙漠边缘。
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2.The Percy limestone formation is famous for its unique fossils.
珀西石灰石层因其独特的化石而闻名。
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3. The Percy limestone was formed over 500 million years ago.
珀西石灰石形成于5亿多年前。