They then built the sand pit initially with bricks, covered the bricks with concrete and then put small stones into the concrete to keep the natural appearance.

然后就是用砖块做沙坑，为了保持自然形态，在砖头上浇注了混凝土并铺上小石子。

youdao

Dependence on long-distance trade also meant that the great empires of the Middle East were built both literally and figuratively on shifting sand.

对长途贸易的依赖也意味着，伟大的中东帝国无论是实际上还是象征意义上，都是建立在流沙之上的。

youdao

He refers to the story from the Sermon on the Mount about how houses built on sand fall, while those built on rock remain standing.

他引用的是“登山宝训”的故事，里面说，建在沙上的房子会倒，建在岩石上的房子依然屹立。

youdao

This sea wall is built right into the hills of sand that make up the coast.

VOA: special.2009.06.01

The loss of the springs brought with it a loss of the natural filtration of soil and sand, however, so the Maya built their own primitive filtration systems, forcing their rainwater runoff through boxes of sand, the researchers found.

MSN: Sustainable tech saw the ancient Maya through drought

And everyone who hears these words of mine and does not do them will be like a foolish man who built his house on the sand.

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