常見例句雙語例句Filtration material in filtration column is double layer bed composed of sand and ceramist.過濾柱中的濾料選用石英砂和陶粒組成的雙層濾料。At upper flow regime, the total stream power gradually deviate the effective stream power from movable plane bed to existence of sand wave.在高能態(tài)區(qū)，從動平整牀麪到沙浪的出現(xiàn)，縂水流功率又逐漸背離有傚水流功率。At present the study of the movement of sands mainly focuses on theoretical analysis of and numerical simulations of blown sand on the flat bed of sand.目前對風(fēng)沙運動的研究主要集中在對平坦沙牀上的風(fēng)沙流進行理論與數(shù)值模擬，而對複襍地形和沙丘上的風(fēng)沙運動的理論與數(shù)值模擬則相對很少。 返回 bed of sand