翻译一句话，机器翻译的免

英国人对客套话永远不嫌烦，这是给学校的信，并且在麻烦别人，需要别人的帮助，说话语气要委婉，客套，并且正式，不能随便，要用please, could ,would等词表现出来。

My sincere apology if this email bothered you in any sense. I am a Chinese student and was admitted to your unviersity this coming fall. I am wondering whether you can check my visa letter status and let me know when it is mailed out.

I was informed last week that my visa letter was delivered through express mail, and I should receive it within 7 days. Unforturnately, I haven't received it till now. Visa letter is very important to me. I need it to finish my paperwork here in China before going to the UK.I wrote an email inquiry several days ago, but not sure whether you received it.

Thank you very much for your assistance!