大学英语词汇短语释义解析及例句 graded bedding


释义：

graded bedding [地质] 粒级层；序粒层；粒级层理

例句：



Depositional beddings such as graded bedding, massive bedding, parallel bedding, cross-bedding and wave bedding, are well developed;

粒序层理、块状层理、平行层理、交错层理、波状层理十分发育；