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模板2： Dear ， I am writing to express my views concerning . In the first place, I would like to say thank you for the help and everything else you have been offering to us. Meanwhile, I also want to make some advice to better . Firstly, we have found that . Secondly, we want to . Finally, we hope that . I am looking forwards to your consideration about my proposals. Thanks in advance for that. Yours sincerely, | 
