sandedadj.铺沙的；满地是沙的；沙地的sandn.沙；沙子；沙滩；黄灰色vt.撒沙；打磨；以沙掩盖sandbox modelling砂箱实验sandaracolic acid山达酸sand - mudstone砂泥岩sand-filtration砂滤Sandra Schumacher舒马赫sand patch method铺砂法Sand regeneration砂再生Sand dust weather沙尘天气sand cement grout水泥砂浆sand exploitation海沙开采