It is best to print both sides of the paper.

最好是双方要打印的文件。

youdao

These engines are not imaging any faster than the sheet fed engines in fact they are slower but use two print engines printing both sides of the web concurrently.

而这类印刷机的成像速度不见得比单张纸的快，但因其可以采用两个印刷引擎，同时印刷卷筒纸的双面，所以效率更高。

youdao

Print on both sides of the paper for internal documents.

使用纸张正反两面打印公司内部文件。

youdao

The request by management in September for employees to print on both sides of paper came as part of a memo with a list of suggestions on ways to be frugal.

WSJ: The Unraveling of MF Global