supporting document的用法和樣例：
例句
- The document was validated by the bank.
銀行核實了這份單據。 - A document sent to a vendor requesting goods or services.
一種提交給賣主的，關於購買貨物和服務要求的單據。 - The custom officer asks him to produce the relevant document.
海關官員請他出示有關證件。 - That's a very interesting claim, but can you document it?
那項要求很有意思，可是你有證件加以證明嗎？
