英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Trias的结果
Trias
(n.)
The formation situated between the Permian and Lias, and so
named by the Germans, because consisting of three series of strata,
which are called in German the Bunter sandstein, Muschelkalk, and
Keuper.