问题： 我该如何回信拒绝期刊的邀稿？

你可以参考以下模版：

Dear Mr./Ms./Dr. [编辑姓名],

Thank you for your invitation to submit my manuscript titled [论文题目] to your journal. However, I am sorry to inform you that the manuscript has already been accepted for pulication by [期刊名]. 

However, I would definitely look forward to publishing with your journal in the future.

Sincerely,

[你的名字]

后续如果还有任何问题，欢迎随时回来意得辑专家视点提问。