zhè / xiē / fèi / zhā / jīng / guò / chǔ / lǐ / hòu / kě / yǐ / yòng / lái / zhì / zuò / jiàn / zhù / cái / liào这些废渣经过处理后可以用来制作建筑材料。This waste can be used to make building materials after being treated.