Such letters should accordingly open with an apology, or at least an expression of regret, when an apology is really unnecessary.
回信的时候应当先对所提出的异议表示道歉，确实不需要道歉时，起码也得表示遗憾。
Such letters should accordingly open with an apology, or at least an expression of regret, when an apology is really unnecessary.
回信的时候应当先对所提出的异议表示道歉，确实不需要道歉时，起码也得表示遗憾。
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