Much like your printer prints ink on a page, 3D printers spit out material, whether it be plastic, metal, or even concrete, to form a 3-dimensional object.

就像墨水打印机在纸上打印一样，3D打印机是用材料打印，不管是塑料、金属，甚至是混凝土，形成一个三维物体。

A hoop is a ring that is made of plastic, metal or wood. The boy tried to toss the ball through the basketball hoop.

箍是一种由塑料 金属或木头制成的环 那男孩试图把球扔进篮筐。

With this in mind, he tested a superhydrophilic material based on a substance called polydopamine, which he knew from previous work binds to a range of materials including plastics, metals and ceramics.

考虑到这一点，他测试了基于一种物质（贻贝）的聚多巴胺超亲水材料，他从之前的工作中知道，这种物质可以与塑料、金属和陶瓷等一系列材料结合。

The concept is quite simple: much your like printer prints ink on a page, 3D printers spit out material - whether it be plastic, metal, or even concrete- to form a 3 dimensional object.

这个概念非常简单：很像打印机在页面上打印墨水，3D 打印机吐出材料——无论是塑料、金属， 甚至是混凝土——形成一个 3 维对象。