grained造句
        Microscopically the ores are medium 
grained to amorphous.
显微镜下,矿石为中粒至非晶质.
The only local coarse - 
grained sand - stones in the uppermost part are important for uranium.
仅最上面局部的粗粒砂岩对铀是有利的.
Fine - 
grained clay may settle out in the sheltered bays on the outer sides of the levees.
细粒粘土可以沉积在天然堤外侧的隐蔽湾中.