短语词组短語marine sand borrow pit 採海沙坑sand storage pit 儲沙坑Sand -pit's form 沙坑形狀rectangular sand -pit 矩形河道desilting sand pit 隔沙池;隔沙井deposited sand pit 沉積沙地clay and sand pit 泥沙鑛坑sand pit ball 沙坑球 返回 sand pit