I said and riv turned around to look at me , an exasperated scowl marring his features .

我说，快速截击车转身看着我，皱着眉头的愤怒玷污他的特征。

With the development of basic construction in our country , people pay more and more attention to the serious short of sand . The problem of transportation and time can be solved by producing hill sand in regions with abundant resource which can also lower cost and save riv .

随着我国基本建设的发展,各地砂源紧缺问题凸显,人们对山砂的应用日益重视,对具有丰富山砂资源的区域,生产山砂可以解决运输、时间上的问题,降低成本,节省资源。