There are three different conceptions about base-level that are base level of erosion,...

基准面有三个不同的概念，即侵蚀基准面、沉积基准面和基准面。

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There are three different conceptions about base-level that are base level of erosion,...

基准面有三个不同的概念，即侵蚀基准面、沉积基准面和基准面。

youdao