A vandal with a chainsaw cut down a tree.一个故意破坏公物的人用链锯伐倒了一棵树。Bruce was no unthinking vandal.布鲁斯决非蓄意搞破坏的莽汉。Vandal have pull the telephone out of the call boxes.破坏公共财产者将电话机扯到电话亭外.The most efficient in poor light conditions...
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...