名词
中文翻译：上新元系
同义词：
['Upper Sinian', "Upper Cretaceous Series例句：1. The Upper Sinian series is a significant geological formation in China's history.（上新元系是中国历史上的一个重要地质构造。）2. The Upper Sinian series contains fossils that are millions of years old.（上新元系包含了数百万年历史的化石。）"]
例句：
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1. The Upper Sinian series is a significant geological formation in China's history.
上新元系是中国历史上的一个重要地质构造。
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2. The Upper Sinian series contains fossils that are millions of years old.
上新元系包含了数百万年历史的化石。
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3.The Upper Sinian series is believed to have been formed during the Late Cretaceous period.
上新元系被认为是在晚白垩纪时期形成的。