ring n.戒指;环;圈;拳击场;马戏场;帮派n.铃声;钟声;电话;口气v.包围;环绕;形成圈v.打电话;回响;鸣响;按铃;听上去
双语例句
Special methods for four-membered Carbocyclic rings are given in Chapter 32. 制取四碳环化合物的特殊方法是在第三十二章中阐述的。
Carbocyclic nucleosides are nucleoside derivatives with special structures and interesting bioactivities, especially antiviral activities. 摘要碳环核苷是一类结构特殊且具有多种生物活性,其中特别是抗病毒活性的核苷衍生物。