I mean, I didn't unwrap it; I just took off the protective plastic layer and went through the box.

我的意思是，我没有打开它；我没有打开它。我只是把保护性塑料层撕掉，然后穿过盒子。

A really hot extruder nozzle squeezes out liquid plastic layer by layer right where the computer program tells it to.

一个非常热的挤出机喷嘴在计算机程序指挥下一层一层地挤出液态塑料。