The flowers were besprinkled with morning dews.花上洒满晨露.The morning dews glitter in the sun.晨露在阳光下闪烁.In the vast shadow of night the coolness and the dews descend.在这苍茫夜色中,寒气与露水降下来了....
The graft mechanism of lignosulfonate and acrylic acid was studied in this paper.本文研究了木素磺酸盐和丙烯酸单体的接枝共聚机理.Through the separation, lignosulfonate with narrow molecular weight distribution was obtained and then chemically m...