jhaiyun888
I'm sorry about the troubles...(you don't have to say the troubles I brought to you...it's unnecessary.)I'm sorry about the trouble I caused...I'm sorry, I caused you so much trouble...to be nicer you can add terribly before the word "sorry":e.g.I'm terribly sorry about the trouble.
蛋爹是石头
我不想再给你造成困扰=> i don't want to messing you up. i don't want to confuse you any more.i hate to annoy you any more.
小马摩羯
官方一般是: we are sorry for the inconvenience(may have caused)sorry to bother you.之类的都比较口语。
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