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- The results show that air permeability coefficient of Al-foam, which is greater than common sand mound's, is influenced by pore structure and increase when pore diameter and porosity are increased. 试验结果表明其透气系数远大于一般砂型透气系数,并且受孔径和孔隙率的影响,增加孔径和孔隙率有利于增加透气系数。
- The elms and willows that grow around the sand mounds form a natural ecological system for bird and plants. 水到处蒲草苇花，沙隔处黄榆杨柳，形成了天然的生态复合系统。
- There are grasses and reeds everywhere.The elms and willows that grow around the sand mounds form a natural ecological system for bird and plants. 水到处蒲草苇花，沙隔处黄榆杨柳，形成了天然的生态复合系统。
- The wind swept up the sand into a mound. 风把沙子吹拢成一个小丘。
- A mound of stones erected as a memorial or marker. 锥形石冢一堆石头，用于表示纪念或标志
- He lay in his bunk under a mound of blankets. 他躺在铺上，身上盖了一大堆毯子。
- There is a mound of papers on my desk. 我的办公桌上放了一大堆文件。
- Ouch! The sand is so hot! I can burn my feet. 哎哟！沙子这么烫！会烫伤脚的。
- The sand blew into the food and made it gritty. 砂吹进食物中，里边尽是砂子。
- There's a mound of books on my desk. 我的书桌上有一堆书。
- The bulldozer leveled the mound of earth. 推土机把土堆铲平。
- The children were playing in the sand pit. 孩子们在沙坑中玩耍。
- The tractor has make deep furrow in the loose sand. 曳引机在松软的沙土上留下了深深的车辙。
- The sun blazed down on the sand. 阳光强烈地晒在沙滩上。
- His company was built on the sand. 他的公司根基不稳固。
- A low mound or ridge of earth; a knoll. 小丘低土丘或圆岗; 小丘
- A mound of soil, sand, or dirt formed by ants or termites in digging or building a nest. 蚁冢，蚁垤蚂蚁、白蚁为挖穴或筑巢而刨出的小土堆或沙堆
- Resembling a pile or mound; heaped up. 堆积的象堆或垛状的; 堆积的
- The river has scour out a passage in the sand. 这条河在沙土中冲出一条水道。
- The boat grounded on a sand bank. 船只搁浅在沙洲上。
