In such areas small tributaries or gullies will not show.在这些地区,小的支流和冲沟显示不出来.These tributaries are subsequent streams which erode strike valley.这些支流系即为蚀出走向谷的次生河.A river and its branches ( or tributaries ) form a river sys...

tributaries的音标：...

n.支流( tributary的名词复数 )，进贡国，附庸国，进贡者...