Please see the attached file.
请见附件。
Please find the attached file: 60302.xls.
请见附件中的60302.xls文档。
Please see the attached file which contains all the information about the project.
请见附件，附件中包含有关该项目的所有信息。

I will forward the attachment.
我将转发该附件。
I'll forward his e-mail to you so you can get the attached file. Let me know what you think about his suggestion, please.
我将把他的邮件转发给你，您就可以收到该附件了。请在收到邮件后告诉我您对他的建议有何看法。