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Explanation: Arrangement 并非正式的协议或合同，而是一种调停式的解决办法，也就是通融的办法，例如：
I'll manage to reach some sort of arrangement with him.
Entry 来自动词 enter，一般的解释是 become a participant，因此在合同方面可以说 enter an agreement，在参加比赛方面可以说 enter a race，在接受治疗方面可以说 enter a drug treatment program 等等，所以 Entry into such arrangement shall not be deemed a waiver of this agreement. 可以理解为“接受该等通融办法，不得被视为扬弃本协议。”换句话说，entry into such arrangement 可以理解为 acceptance of such arrangement。