The nl command Numbers lines, which can be convenient when printing files.

nl命令可以对行进行编号，这在输出文件时非常方便。

youdao

The latter is not required, especially because it's a difficult value to gauge, but it does provide options for people who want to limit the printing of graphically intensive files.

最后一个选项不是必须的，特别是因为它的值很难测量，但希望限制打印图形密集型文件的用户的确可以利用这个选项。

youdao

Any other printing functions PHP has will work equally well for this, as will any functions that write to files.

PHP拥有的任何其他打印函数将会像此函数一样运行正常，任何写回文件的函数也是一样的。

youdao

In just the last six days, according to Wilson, 20, 000 files have been downloaded from Defcad, including more than 2, 200 downloads of files for printing the three pieces that are assembled to create the magazine.

FORBES: Gunsmiths 3D-Print High Capacity Ammo Clips To Thwart Proposed Gun Laws

Cubify.com provides more easy printing options for new users with 3D apps that generate free print files and an entire 3D printing marketplace of items to choose from.

ENGADGET: 3D Systems second-gen Cube 3D printer boasts faster prints and more materials