短语词组短語high -bank caving 大放高bank caving line 坍岸線bank caving and protection 崩岸與護岸mechanism of bank caving 坍岸機制present state of bank caving 坍岸現狀Stability of the bank caving 塌岸躰穩定性caving bank 淘空堤岸;坍岸 返回 bank caving