要求书面的备份，并保存一份信件和回复的复印件。
Ask for repairs in writing and keep a copy of the letter and response.
如果给他寄信的人要求他回信的话他就会尽力回复来自不同国家的信件。
He tries to answer letters from foreign countries, if the writer requests a reply.
如果给他寄信的人要求他回信的话他就会尽力回复来自不同国家的信件。
He tries to answer letters from foreign countries, if the writer requests a reply.
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