道路在暴风雪之后铺上了沙子。
The roads were sanded after the snowstorm.

孩子们在沙坑中玩耍。
The children were playing in the sand pit.

干沙吸收水份。
Dry sand absorbs water.

小孩们在沙堆里挖了一个地道。
The kid dug a tunnel in the sand.

工人们把沥青和沙子、石块混合在一起。
The workers mixed the asphalt with sand and gravel together.

这个小沙丘是由风吹来的干沙子形成的。
The little dune is formed with loose dry sand by wind.

他往土里掺了些沙子以提高渗水性能。
He added sand to the soil to make it more porous.

在风天，我们能看到无数沙粒。
We can see numberless grains of sand in a windy day.