3Use the duplex printing option on your printer to use both sides of a sheet of paper.

3利用打印机的双面打印功能来使用纸的正反面。

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According to a recent European Union "green purchasing" guide, duplex printing can cut costs by 38% over the life of a printer.

根据最近一份欧盟的绿色采购指南，双面打印能够削减一台打印机寿命中38%的成本。

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The market is declining 2%-3% a year because, as Pereira explains, more people are going digital but also because of duplex printing.

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For the PIXMA MG4220 Wireless and PIXMA MG3220 Wireless printers, Auto Duplex printing has been included to help reduce overall paper usage costs.

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It supports duplex printing (automatically printing on both sides without having to manually re-insert the paper) and unlike some other printers, there is no separate attachment for duplex.

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