The sand falls from the top of the sand glasses to the bottom.

沙子从沙漏的顶部落到底部。

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Relentless winds have scored fine lines into the top of a dune and swept sand into a mangrove forest, smothering trees that are now reduced to denuded trunks.

无情的大风在沙丘顶部刻下一道道细线，把沙子刮进红树林，闷死了树木，如今只留下一根根光秃秃的树干。

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If your soil does not contain a lot of sand, add a 3-inch layer of sand on top of the soil.

如果土壤含沙量不够，则需在土壤表面覆盖3英尺的细沙。

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It could be removed later by scraping up the top layer of sand.

ECONOMIST: A slick off America's coast

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After a 3 year study, we get the shocking news that most of Nebraska sits on top of the Ogallala Aquifer and that the Sand Hills occupy 25% of the state.

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