你在信上是怎么署名的？你写上“忠实于您的”了吗？
How did you sign the letter? Did you write, "Sincerely yours"?
值此60周年大庆，我方特借此机会感谢所有新老客户，我方六十年的成功得益于您的忠实惠顾。
As we celebrate our 60th anniversary, we want to take this time to thank all of our customers whose loyal patronage had allowed us to be so successful over the past 60 years.
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