Diatoms of this species, sometimes called "commuter" diatoms, remain burrowed in the sand during high tide, and emerge on the sand surface during the daytime low tide.
这种硅藻，有时被称为“通勤硅藻”，在涨潮时留在沙土中，在白天退潮时出现在沙土表面。
Appearance white, more edges and corners, without powder product attached to quartz sand surface.
外观洁白，多棱角，无粉末积附于石英砂表面。
Hydraulic gradient in sand increases constantly and the maximum is occurred when the bottom of bucket arrives to the sand surface.
砂中水力梯度一直增大，极大值产生在桶底接触砂面时。
The research state and major results on the rate of sand transportation on a try sand surface are introduced based on some references in this paper.
本文根据有关文献，介绍了到目前为止对岸滩干沙表面输沙率的研究状况及主要成果。
The research state and major results on the rate of sand transportation on a try sand surface are introduced based on some references in this paper.
本文根据有关文献，介绍了到目前为止对岸滩干沙表面输沙率的研究状况及主要成果。
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