The process of changing an open-chain hydrocarbon structure to a closed ring, e. g. , hexane to benzene.
使开链烃结构变成闭环烃的过程，例如使己烷变成苯。
Its chemical properties are similar to those of alkanes, but its molecule is in the form of closed ring.
其化学性质与烷烃相似，但其分子是闭环形式。
The two theorems are proved that any ring can be extended into an algebraically closed ring and that the quaternionic skew field over a real closed field is algebraically closed.
证明了任一环有代数封闭的扩张环，且实封闭域上的四元数体是代数封闭的，给出了代数封闭环的若干性质。
The two theorems are proved that any ring can be extended into an algebraically closed ring and that the quaternionic skew field over a real closed field is algebraically closed.
证明了任一环有代数封闭的扩张环，且实封闭域上的四元数体是代数封闭的，给出了代数封闭环的若干性质。
应用推荐