n (1)沙子(fine material made of very small pieces of rock，shells，etc that is often found on beaches and in deserts)[U]：fine/loose/quick/singing～细/散/流/鸣沙;～hill 沙岗(丘);S～is used in the making of glass. 沙子用来制造玻璃。

(2)沙滩(地)(area or expanse of sand，esp on beach)[U，C 通常pl]：dig/play in the～s on the beach 在海边的沙滩上挖洞/玩;play/lie on the～(s)在沙滩上玩/躺着;a beach with beautiful～s 一处有美丽沙滩的海岸;Camber S～s 坎伯沙洲;

build on sand 不切实际：He has very little experience of business，and the whole organization was built on～. 他没有经营经验，整个组织都是不切实际的。

the sands are running out 没有多少时间了：The～s are running out，we have to fulfil our task this evening. 没多少时间了，今晚我们必须完成任务。

→′sandy adj 沙质的;沙色的;′sandiness n 像沙子的物质;沙色彩;′sandbag n 沙袋，沙包;′sandbank n 沙堤(洲);′sand-bar n 沙洲;′sand-blast n 喷沙;′sand-castle n(儿童在沙滩上筑的)沙堡;′sand-fly n 沙蝇;′sandpaper n 砂纸;′sand-pit n 沙坑;采沙场;′sand-shoes 沙地鞋;′sandstone n 沙岩;′sandstorm n 沙暴;′sand-yacht n(装有车轮和帆，在沙子上行驶的)沙船;

vt(1)用沙(砂纸)擦 (smooth or polish，as with sand or sandpaper)[T+n，T+n+adv(down)，C+n+adj]：～the floor/the furniture (down) before varnishing it刷油漆前要把地板/家具用砂纸磨光;～the floor smooth 把地板打磨平滑;

(2)撒沙(sprinkle or cover with sand or similar material)[T+n]：～an icy sidewalk/road 在结冰的边道/路上撒沙子;

→′sander n 砂轮磨光机