The coarse layers are commonly constituted by fine sand, coarse sand and gravels, which suggests a fast depositing.
粗粒层一般为细砂、粗砂和砾石层，具快速堆积的特征。
They may form concentrated pockets in gravels.
它们可能在砾石堆积物中形成富集的矿囊。
Study of critical gradient of piping for various grain sizes in sandy gravels
砂砾土各级颗粒的管涌临界坡降研究
Experiment Research on the Method of Ramming the Gravels
群夯碎石挤密法施工的试验研究
It gravels me that she doesn't call when she knows she'll be late.
她明明已经知道要迟到了，却不来个电话，这太让我生气了。
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