This is a 3—d printer.and this is an artifical ear.
问题描述：
This is a 3—d printer.and this is an artifical ear.
答
这是3D 打印机,这是人造耳朵
请在客户端右上角评价点“满意”即可,can you believe that scientists printed this artifical ear by this 3_dprinter?又是什么意思？你能否相信科学家是用3D打印机把这的人造耳朵打印出来的？