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Dear Mrs. Malcolm,
We are so glad to hear that John has graduated from Princeton and that he made a very fine record for him- self there. You must be proud of his splendid accomplishment, and we are very happy for you.
Please give John our congratulations and our best wishes for success and happiness in his chosen work.
Sincerely yours,
Linda
促红细胞生成素是由肾和肝分泌的一种激素样物质,主要为肾分泌,能够促进红细胞生成。
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