incised valley

• 下切河谷

incised valley的用法和样例：

例句

1. The incised alley was gradually inundated when sea-level rose during the postglacial period and a huge estuary was formed.
   冰后期海平面上升，下切河谷被淹，并转化为河口湾，海水随之扩展到两侧的古河间地。