I'm sorry,dear sister ,Please forgive me(抱歉,好姐姐,请原谅我); Dear sister ,I'm so sorry.Please accept my sincere apology(亲爱的姐姐,对不起啦,请接受我诚挚的道歉吧) 逻辑上说的通
I'm sorry my dear sister. I made a mistake. Please accept my appolagize.
Please accept my apologise. Sorry,dear sister. I am fault~
please accept my appologise ,i am sorry,sister,it is my fault