名词
中文翻译：逆流
同义词：
['countercurrent', 'counterflow', 'hydraulic current']
例句：
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1. The river flows through the valley, carrying sediment downstream.
这条河流穿过山谷，携带沉积物向下游流动。
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2. The countercurrent is strong enough to carry the heavier particles.
逆流足够强，能够携带较重的颗粒。
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3. The hydraulic current is responsible for the movement of water in a river.
水力学流动是河流中水流运动的原因。