stratum [ˈstrɑ:təm]以下由轻松背单词网站提供
单词级别第10级基本释义n.地层,社会阶层英英释义one of the parts or layers into which something is separated参考例句The coal is a coal resource that reserves in old stratum. 石煤是贮藏在古老地层中的一种煤炭资源。How does Chinese society define the class and stratum? 中国社会如何界定阶级与阶层? 推荐阅读 |