制造商之间的恶性价格战已将利润削减到了最低。A vicious price war between manufacturers has cut margins to the bone.90%的肿块都不是恶性的。Nine out of ten lumps are not cancerous.检查手术切片，以判断是否为恶性。Tissue that is removed during the operation is checked for ...
聚乙烯醇 的耐辐解可通地苄叉化和苯甲酰化提高.Poly ( vinyl alcohol ) has been protected against radiation by benzalation and benzoylation.聚乙烯醇的耐辐解可通过苄叉化和苯甲酰化提高.Poly alcohol has been protected against radiation by benzalation and benzoylation.比...