3D printers

6 Minute English

语言学习

2022-12-22

6 分钟
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  • Sam: I’m Sam.

  • Neil: And I’m Neil.

  • In 1436 in Germany, Johannes Gutenberg, invented the printing press -

  • a machine capable of making many copies of the same page of text.

  • Ever since, printing has been used around the world

  • to produce books, newspapers and magazines.

  • Sam: Printing technology has come a long way since Gutenberg’s time,

  • but even today’s most advanced laser printers

  • have only printed flat, two-dimensional objects…

  • until now.

  • Neil: In this programme, we’re discussing 3D printers –

  • printers which can build solid, three-dimensional objects

  • out of a variety of materials including plastic, concrete and metal.

  • Sam: Now, Neil, when you say a printer that can make solid objects,

  • I guess you’re not talking about a normal printer…

  • Neil: That’s right, Sam.

  • These large and complex 3D printers work in a completely different way.

  • Unlike a sculptor who chips away at a block of stone to reveal a shape underneath,

  • 3D printers work in the opposite way,

  • building up physical objects by adding material layer on layer.