河道的英文：
riverway
the course of a river

These channels are most common near the apex of the alluvial fan body
这些河道最常见于近冲积扇体的顶端。

Then , through a deep channel they flow through some gardens, and down to Christchurch, into the sea.
然后，通过一条很深的河道。流经一些花园和克赖斯特彻奇，汇入大海。

Lateral deposits are on the sides of a channel of immediately adjacent to it
侧积位于河道两边紧邻河道。

The river widens as it flows.
河道渐变宽。

dredge a channel [ harbour ]
疏浚河道[港口]

The river is silted up and the water flows sluggishly
河道淤塞，水流迟滞。

channel enlargement works
河道展宽工程

They are sounding the river.
他们在测量河道的深度。

The riverbed is silted up, so there's no outlet for the floodwater.
河道淤塞，洪水无出路。

The riverbed is silted up, so there's no outlet for the floodwater
河道淤塞，洪水无出路。

a bobsleigh course
大雪橇滑道

It is not, of course, exhaustive
当然这是不够详尽的。

In college, English is a required course and psychology is an elective course.
在大学里，英语是必修课而心理学是选修课。

subsequent river
后成河

a river the of lava
熔岩的巨流

They snagged the river.
他们为河流清除了暗桩。