The water had raced down the slope and scoured out the bed of a stream.

水顺着山坡流下来，冲刷出一条小河道。

《牛津词典》

Because the stone cage net is used to control and guide the river and flood way of canal bed, slope revetment and other effects, so called river stone cage net.

因为石笼网首要用于操控和引导河流及洪水，途径运河河床，护岸护坡等效果，因此多被称为河道石笼网。

youdao

Critical shear stress as related to bed slope was calculated.

计算出了与沟坡相关的临界剪切应力。

youdao

The sediment grains bouncing along the bed get pushed up the rearward-facing slope (stoss) and then avalanche down the other side (lee).

BBC: Curiosity Mars rover to investigate classic rock type

After a long day of studying data, including slope angles, solar energy, weather and powder patterns and nearby transportation facilities, Mr. Mathews occasionally goes to bed pondering problems and wakes up with solutions.

WSJ: Paul Mathews of Ecosign, Scouting the World for Killer Ski Slopes | Creating