CMU financial documents

CMU的isi-form上面关于财产证明有这样一句话：

[align="left"] Financial support must equal or exceed tuition and expenses for the first academic year. We must also consider how you will meet the expenses for the entirety of your program. Therefore, you or your sponsor must include additional financial statements or a letter explaining how future expenses will be paid.[/align]
[align="left"]请问后面这一部分要怎么写？有人写过吗？有没有模板？[/align]
[align="left"]谢谢！[/align]