河在静静流淌，水会在河岸这边留下沉积物，并侵蚀另一边。
When water flows around a river bend, it deposits sediment on one bank while cutting away at the ground on the opposite bank.
卡德纳斯教授表示，他最近的一项研究显示，99%的河流水确实会穿过河岸边或河底的沉积物。
Professor Cardenas says his recent study shows that more than 99 percent of the river's water does pass through the river's sediment which is on the shore or bottom of the river.
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