之前提供的单据是否有用？是否还需要其他文件？的翻译：Provided before the document is useful? If additional documentation is required? 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

Whether it is useful to provide the documents before? Still need other files?

Provided before the document is useful? If additional documentation is required?

Before provides the documentary evidence is whether useful? Whether also needs other documents?

The documents provided before it is useful? Is there still any need other documents?

Provided before the document is useful? If additional documentation is required?