Sandun.三都sandn.沙；沙子；沙滩；黄灰色vt.撒沙；打磨；以沙掩盖Sand-barrier沙障sanding sealer掺砂涂料sanded plaster掺砂石膏浆Sandong Theory“散动”理论sandstorm land风沙地sand clay loam砂质粘壤土sandland water沙地水分sand-eel oil砂鱣鱼油sand additions型砂加入剂Sandhills chub伦氏风鱼