音标与读法

这里为大家介绍下key bed 是什么意思，希望能帮助到各位朋友。

中英文翻译

【地质学；地理学】标准层。

key:n. 礁，暗礁(＝cay, quay)。 bed:n. 1.床，床铺；床位，铺；(动物的)窝；〔比喻〕安乐 ...In geology, a key bed (syn marker bed) is a relatively thin layer of sedimentary rock that is readily recognized of the basis of either its distinct physical characteristics or fossil content and can be mapped over a very large geographic area.Neuendorf, K.

例句与用法

1.Study on the key bed theory of roof supporting in stope

采场支撑顶板关键层理论的研究

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