Coarse and uniform sand, as filtering material, could prevent filtering material loss and agglomeration.

粒径较粗且均匀的河沙滤料的使用，避免了滤料的大量流失和滤料结块。

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We found that the uniform sand didn't present SOC and the non-uniform system showed SOC in our experiments.

我们在实验中发现大规模均匀沙不呈现SOC，而大规模的非均匀沙呈现SOC。

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The test results showed that: two-step air impactmoulding process can achieve the moulds with high and uniform sand compaction;

前言： 研究表明：双冲击造型可以大大提高砂型紧实度及其均匀性；

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Professor John Zarnecki, principal investigator on Huygens' surface science package (SSP) said the area where Huygens landed appeared to have a thin crust that overlies a material with more uniform consistency something like wet sand.

BBC: NEWS | Science/Nature | Titan mission 'resounding success'