His response: “We have this huge problem that we sort of don’t talk about, that people die all the time from car accidents. It’s kind of insane. But the most interesting thing is, if we can reduce accidents and deaths, then we actually have a whole other problem on our hands of, ‘Where do we get organs?’ I don’t think we’ll actually be printing organs until we solve the self-driving car issue. The next problem will be organ replacement.”

佩蒂斯回答道：“随时都有人在车祸中丧生，但我们似乎很少谈论这个大问题。多少有些荒唐。不过，最有意思的事情是，如果我们能够减少车祸数量和丧生人数，那么我们真的会遇到另一个棘手的大问题，那就是‘人体器官从哪儿来?’我觉得在解决自动驾驶汽车的问题之前，3D打印人体器官并不会真的实现。接下来的问题将是器官替换。”

It’s not impossible to 3D-print an organ, he said, but there are challenges around raw materials. “Right now you take liver goo, and you squeeze liver goo into the shape of a liver and it grows together and hopefully becomes a liver. That’s the idea of 3D printing organs,” he said. The challenge, he said, will be getting the science of the “liver goo” right, before the actual printing part even comes into play.

他指出，3D打印人体器官并非不可能，但原材料方面有一些难点。“现在的方法是取来肝细胞，把它们弄成肝脏的形状，再盼着它们生长发育成肝脏。这就是3D打印人体器官的思路。”佩蒂斯说，难点在于正确地“取来肝细胞”，随后才是真的进行3D打印。

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