“成环”的拼音为：chéng huán...

后者经过热解,就转变成环己二烯酮的衍生物.Thermolysis of the latter furnished the cyclohexadienone system.链型机器人也可以组装成环型的滚动机器人或两足步行机器人.They can also become rolling loops or bipedal, walking robots....

“成环”的英语可以翻译为：cyclization，ring formation ...