3D printing is changing the way we produce objects, from tools and toys, to food, and even body parts. It's a tech revolution taking place in homes across the world. 

But how does it work exactly, and what makes it so efficient? Mashable explains the basics of 3D printing technology.

Computer Tutorial: 3D Printing & How It Works

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Let's do English ESL general vocabulary practice. 3D printing is changing the way we produce objects, from tools and toys, to food, and even body parts. It's a…