We sent the documents by courier.

我们派了信使送交这些文件。

《牛津词典》

Choose the best method for delivering the letter, whether it be in person, by post, or by courier.

选择送信的最佳方式，不管是通过个人、邮局或者是快递公司。

youdao

I'm sending it by Courier again.

我会用快递再寄一次。

youdao

Anyway, Cuban exiles have long found ways to circumvent restrictions, for instance by sending money by courier through third countries.

ECONOMIST: Fidel Castro has got rougher, so what does George Bush do?

Staff at the DWP have been trying to contact as many pensioners in Cyprus as possible, by email, phone, and even sending letters by courier.

BBC: UK pensioners 'struggling' to cope in Cyprus

Getting a document delivered by courier, sending a fax, or simply gathering colleagues for a business meeting can all take far longer than seems reasonable.

ECONOMIST: Business travel