名词
中文翻译：下石灰石组
同义词：
['lower limestone', 'lower limestone formation例句：1. The lower limestone group is known for its rich fossils.（下石灰石组以其丰富的化石而闻名。）']
例句：
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1. The lower limestone group is known for its rich fossils.
下石灰石组以其丰富的化石而闻名。
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2.The lower limestone group was formed millions of years ago.
下石灰石组数百万年前形成。
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3. The lower limestone group is an important source of minerals in the region.
下石灰石组是该地区重要的矿物来源。