例句與造句

1. by using wind-blown soil, fly ash, clay, a small amount of cement and addition agent as raw materials in this paper, the optimum dispensation formula and spreading theory about filling and pre-grouting of composite filling material were studied to have important practical significance to large filling and pre-grouting project
   本文利用風積土、粉煤灰、粘土、少量水泥和其它外加劑為原材料，研究復合充填注漿材料的最佳配比及其擴散充填注漿理論，對于大型充填注漿工程具有重要的現(xiàn)實意義。
2. It's difficult to find composite filling material in a sentence. 用composite filling material造句挺難的