短語詞組短語obsequent valley 逆曏穀obsequent slope 反傾邊坡obsequent river 逆曏河obsequent stream 逆曏河obsequent rift block 逆陷斷塊obsequent -subsequent stream 反曏次成河obsequent t river 逆曏河obsequent faultline scarp 逆曏斷線崖obsequent fault line scarp 逆斷線崖 返回 obsequent