星级典句：

第一句:Here is the receipt.
这是收据。
A:Here is the receipt.Please keep it.Sir.
这是收据，请拿好，先生。
B:What for?
这是干什么用的？
A:It's required when you draw back the duties.
退税的时候需要。
第二句:Here is your tax-refund form.
这是您的退税单。
A:Here is your tax-refund form. Please keep it.Sir.
这是您的退税单。请保存好，先生。
B:What for?
干什么用？
A:You can draw back the tax paid at the customs with this form.
你开业凭这张表格在海关取回所付税款。
B:Oh,I see.Thank you!
哦，明白了，谢谢你！