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　　开头句：自我介绍、说明写信目的。
　　I’m interested in … Could you provide me with more details?
　　I would be very grateful to you if you let me know…

　　结尾句：表示感谢，期盼回复。
　　I am expecting your early reply/ your immediate response.
　　Your prompt attention to this letter would be highly appreciated.