pennsylvanian

1. 1.

   Of or pertaining to the state of Pennsylvania.

   宾夕法尼亚州的,或与其相关的。

2. 2.

   Of any of the three geologic epochs (lower, middle and upper) within the Carboniferous period from 318 to 299 million years ago; marked by a high oxygen atmosphere and the rise of reptiles and winged insects.

   石炭纪中从3.18亿到2.99亿年前的三个地质时期(早、中、晚)的；以高氧大气和爬行动物及有翅昆虫的兴起为特征。

石炭纪中从3.18亿到2.99亿年前的三个地质时期(早、中、晚)的；以高氧大气和爬行动物及有翅昆虫的兴起为特征。；宾夕法尼亚的

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