Traditionally, 3-D printing works by fusing metal powder together layer by layer with a laser.

传统上，3D打印的工作原理是将金属粉末融化，并在激光的作用下，一层一层粘合起来。

Ben couldn't find printing work in New York, though.

不过，本在纽约找不到印刷工作。

The governor of Pennsylvania saw Ben's printing work.

宾夕法尼亚州州长看到了本的印刷工作。

Having the duplicator in the Safaliba area makes it possible to do almost all the printing work locally. It will help the Safaliba community to print books in their own language.

在 Safaliba 地区拥有复印机使得几乎所有的打印工作都可以在本地完成。它将帮助 Safaliba 社区以他们自己的语言印刷书籍。