英语语法分析

This eventually resulted in the oxygen-rich atmosphere of the Carboniferous period around 340 to 280 million years ago.

这导致在距今2.8到3.4亿年前的石炭纪大气中的氧气几近饱和。

The term is used at various localities in north africa, includes beds ranging from carboniferous to early cretaceous .

在北非不同的地方使用这个名称，包括从石炭纪到早白垩纪的地层。

Upper Jurassic red bed cover directly on coal measure strata of Permian and Carboniferous system in Yanzhou coal field.

兖州煤田的上侏罗统红层直接覆盖于二叠、石炭系煤系地层之上。