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汉语拼音：ní shā

泥土沙石。

1. 泥土与沙子。

   南朝 梁 刘孝标 《东阳金华山栖志》：“夫鸟居山上，层巢木末；鱼潜渊下，窟穴泥沙。” 唐 杜甫 《黄鱼》诗：“泥沙卷涎沫，回首怪龙鳞。” 杜宣 《新安江上》：“等我们抽完围堰中的水，河底见到太阳了，使千百万年沉在河底的泥沙，重新见到太阳。”

2. 比喻卑微的地位。

   唐 虞世南 《门有车马客》诗：“逢恩出毛羽，失路委泥沙。” 宋 王禹偁 《寄献润州赵舍人》诗：“应笑 陶潜 未归去，折腰奔走在泥沙。”《金瓶梅词话》第四四回：“穷途日日困泥沙，上苑年年好物华。”

• Mud is silting up the stream.

  泥沙把小河淤塞了.

• The water contains fine silt.

  水里含有细泥沙.

• The channel is almost choked with silt.

  水渠里淤了很多泥沙.

• Continued deposition of silt along the coast is crucial in counteracting the rise in sea level.

  海岸边泥沙的不断沉积对于抑制海平面的上升起着至关重要的作用。

• The bar was formed by the mud and sand deposited here over a long period of time.

  河里的泥沙淤积在这里,年深日久便成了沙洲.

• These fine particles also settle according to Stoke's law.

  这些细泥沙按斯托克斯定律下沉.

• He drew in an old basket full of sand.

  他打捞上来一只灌满泥沙的旧蓝子.

• Great quantities of sand were washed down the hillside by the rain.

  雨水把大量的泥沙冲下山坡.

• The setting velocity of a particle directly characterizes its reaction too flow.

  单颗泥沙沉降速度直接表现出它对水流的反作用.

• For highly cohesive sediment, the critical tractive force becomes less significant.

  对于高粘性泥沙, 临界推移力就成为不重要的.

• The pigs wallowed in the mud.

  猪在泥沙沼中打滚.

• All sediment deposition is not injurious.

  所有的泥沙淤积并不都是有害的.

• Many rivers carry silt toward the equator.

  许多河流带着泥沙流向赤道.

• Natural sediment particles are not spherical.

  天然泥沙颗粒不是球状的.

• The flood scoured away mud and sand.

  洪水冲走了泥沙.