他说：“网格中有一些间隙，在这些间隙里交叉着很小的自然排水渠道，而这些线条本身却没有完全被充填，有着许多小的条纹和不均匀的覆盖范围。”
They have gaps in them where they cross little natural drainage channels and the lines themselves are not perfectly filled in, with lots of little streaks and uneven coverage.
与砂土不同，粉土的尺寸比较小，在充填时将很快形成重度不均匀的泥浆。
Silty slurry would be anisotropic quickly because of the deposit of silt.
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