I traced the course of the river on the map spread out on my briefcase.
我在自己公文包上铺展开的地图中勾画出了这条河的流向。
The course of this river used to be quite irregular.
这条河的流向原来很不规则。
The path follows the course of the river.
小路沿河道延伸。
On the map we chart the course of the river.
我们在地图上标出了该河的流向。
You can see the course of the river on the map.
你可以在地图上看到这条河的走向。
Later it declined due to the change of a river course.
后来因为河水改道，才逐渐衰落下来。
Bend flow is a common phenomenon of water movement in channels and river course.
弯道水流是渠道和河道中常见的一种水流运动现象。
Bend flow is a common phenomenon of water movement in channels and river course.
弯道水流是渠道和河道中常见的一种水流运动现象。
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