The other two, thymine and cytosine, are single ringstructures called pyrimidines.
另两个为胸腺嘧啶和胞嘧啶,即称为嘧啶的单环结构。
2
As star structure is superior over bus and ringstructures in operational maintenance, transmission time and so on, dual-star structure is proposed for process level networking.
星形结构在运行维护、传输时间等多方面优于总线型、环形结构,宜采用双星形结构构建过程层网络。
3
The compounds have the connecting ringstructures of piperazine or piperidine, have notable antitumor activity, and provide a new choice for preparing antitumor drugs in clinical practice.