文字稿:

A fully functional gun made with a 3D printer.

The controversial group who designed the firearm want to makeit available online.

Anti-gun campaigners have criticised the project; while law enforcement agencies are monitoring developments.

3D printing has been hailed as the future of manufacturing, and works by building up layer upon layer of material to make solid objects.

Vocabulary 词汇:

fully functional 完全可以使用的

firearm 手枪

anti-gun campaigners 参加反对枪支运动者

law enforcement agencies 执法机构

hailed as 被称为