The quantitative relation among the threshold wind velocity of sand movement, sand diameter and the agglutinate stress of sand bed is obtained with the mentioned dimensionless variables.
2
压根找不到暗示附近有近岸沙床的哪怕一小片海藻，或者一星点生机颜色。
Not a fleck of seaweed or splash of color to give a hint of a sanding shelf.
3
一些工程师建议这段时间应该被延长，以便沙床能够在泥浆块被移除后休息一个月的时间。
Some engineers suggest that this period be extended to allow a sand bed to rest for a month after the sludge cake has been removed.
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