名词
中文翻译：德文安的
同义词：
['Devonian Period', 'Devonian System']
例句：
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1. TheDevonian period is known for itsfossils and rocks.
二叠纪时期以其化石和岩石而闻名。
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2. The Devonian system was a complex ecosystem thatexisted during the Paleozoic era.
二叠纪系统是古生代时期的一个复杂生态系统。
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3. The Devonianperiod is often associated with the rise ofearly mammals.
二叠纪时期常常与早期哺乳动物的出现联系在一起。