• 1. reflexive transitive closure: 自反传递闭包
• 2. reflexive and transitive closure: 自反传递闭包 | 自返转移式闭锁

• 1.And generate Rs reflexive closure, symmetric closure and transitive closure.
  并且生成r的自反闭包、对称闭包和传递闭包。
  dict.yoduao.com

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