下面是发票号，一旦有空帮忙开发票的翻译：The following is the invoice number, once a blank help invoicing 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Here is the invoice number, invoice once the free help

The following is the invoice number, once a blank help invoicing

Below is the receipt number, once has free time helps to write the receipt

The following is a invoice number, once available help invoicing

The following is the invoice number, once a blank help invoicing