慢速英语:德克萨斯男子计划开始销售3D打印枪支

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3D (three-dimensional) - n. having or seeming to have length, width, and depth

printing - n. the process of producing books, magazines, etc. by using machinery

cryptocurrency - n. a money that only exists electronically

access - n. a way of being able to use or get something

detector - n. a device that can tell if a substance or object is present

accountable - adj. required to be responsible for something