antecedent drainage是什么意思
中文翻译先成水系
网络释义
1)antecedent drainage,先成水系2)antecedent river network,先成水系3)preformation,先成论;先成说4)antecedent valley,先成谷（地）5)antecedent stream,先成河6)preformation,先成说7)antecedent river,先成河8)antecedent valley,先成谷9)preformation theory,先成说10)preformationism,先成说
