the carboniferous

• 石炭纪

the carboniferous的用法和样例：

例句

1. In Early Carboniferous, Tianshan mountains entered an intraplate evolution stage.
   从石炭纪开始天山地区进入陆内演化阶段。
2. The Characteristics of Carboniferous strata and milleral resources in Guangxi were briefly in troducted.
   概要介绍广西石炭纪地层特征及矿产资源。