I was pleased to receive your letter,asking what advice I wo

我很荣幸收到你的 （问我给你们俱乐部成员什么建议） 的信.
括号里的成分翻译的是后边的分词结构
asking what advice I would give to the members of you club 分词作定语 相当于定于从句which asks what advice I would give to the members of you club 修饰先行词lette