| 1. | Natural sediment particles are not spherical .
天然泥沙颗粒不是球状的。
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| 2. | Sediments acted as a restricting control .
沉积层起着屏蔽的作用。
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| 3. | Sediment begins to choke the channel's opening .
沉积物开始淤塞河道口。
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| 4. | All sediment deposition is not injurious .
所有的泥沙淤积并不都是有害的。
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| 5. | Stain of the sediment reveals numerous bacteria .
尿沉渣染色显示无数细菌。
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| 6. | What does the terrigenous sediment consist of ?
陆源沉积物是由什么组成的？
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| 7. | The quaternary sediments are largely undeformed .
第四纪的沉积物大部分未变形。
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| 8. | Pelagic sediment contains tiny grain of material .
远洋沉积物包含了微细物质颗粒。
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| 9. | The sediments are characteristically very fossiliferous .
沉积物的特征是含化石很多。
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| 10. | The arrow indicates direction of sediment transportation .
箭头表示沉积物的搬运方向。
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