1. The harbour is slowly silting up. 
   港口正在慢慢地被淤泥堵塞。
2. and silting up of the rivers and wetlands in the Yangtze basin as a result of rising rates of erosion. 
   侵蚀率不断上升，导致长江流域的河流和湿地淤塞。
3. First , erosion resulting from excessive deforestation in the upper reaches of the river and , second ,heavy silting which raised the riverbed in the main channel. 
   第一，过度砍伐引起的河流上游的侵蚀，第二，严重的泥沙淤积抬高了主干道的河床。

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• 1. 淤积
  silt loam粉砂壤土...silting淤积...siltstone粉砂岩
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• 2. 泥泞
  silo 筒仓...silting 泥泞...similarity criterion 相似准则
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• 3. 淤泥沉积
  silting deposit 冲击层...silting 淤泥沉积...silting-up 淤积
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• 4. 沉积淤泥
  silt of ditch 淤泥...silting 沉积淤泥...silty soil 粉砂土
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