in a quarrel, both parties are to blame. 意味

• In a quarrel, both parties are to blame.
  喧嘩両成敗
  けんかりょうせいばい
  

• both parties:    both parties両方りょうほう双方そうほう
• acceptable to both parties:    《be ～》両者｛りょうしゃ｝にとってまあまあ許容｛きょよう｝できる
• agreement binding on both parties:    双務協定｛そうむ きょうてい｝