The layers are sprayed with multiple print heads, inkjet-style.

这些层由多个打印头喷涂，喷墨式的。

In fact, autopsies of many former athletes have revealed that they had chronic traumatic encephalopathy or CTE; a disease that people with multiple head injuries can get.

事实上，许多前运动员的尸检显示他们患有慢性创伤性脑病（CTE）；头部多处受伤的人可能患有这种疾病。