The prospector panned off bits of sand and gravel scooped from the bed of a stream.
探矿者淘选从河床中挖出的少量含金泥砂和沙砾。
Stream gradient and bed sand constituent are the main factors which is influencing on river pattern formation in the boundary condition.
河道比降、床沙组成是河道边界条件中影响河型形成的最主要因素。
The prospector panned out bits of sand and gravel scooped from the bed of a stream.
探矿者淘选从河床里挖出的少量含金泥沙和砂砾。
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