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来源：雅诚德英语网
On behalf of the Students' Union, I'm writing to invite you to give us a speech on Chinese history.
我代表学生会写信邀请您给我们做一个关于中国历史的演讲。
On behalf of the Students' Union, I'm writing to invite you to give us a speech on Chinese history.
我代表学生会写信邀请您给我们做一个关于中国历史的演讲。