diagram chase造句

• By using the technique of diagram chasing, we get some characterizations of exact sequences on sets, which generalize the results of commuting diagrams about modules ( s-acts ) in the module theory ( s-act theory )
  用图追踪的方法得到了集合上正合列的若干性质，推广了模论(s-系理论)中关于模(s-系)的正合交换图的结论。