sand1/sænd; sænd/n 1 [U] the substance that forms deserts and BEACHES , which consists of many very small pieces of rock 沙﹐沙子: a grain of sand 一粒沙子2 sands [plural 复数] a large area of sand 沙滩
sand2v [T] to make a surface smooth by rubbing it with SANDPAPER 〔用砂纸〕打磨﹐把…磨光
sandsandsandssandedsandingnoun (no plural)powder made of very small pieces of rock, that you find on beaches and in deserts: Concrete is a mixture of sand and cement.