translation.en: But if we move on and think throughout history how people have used different materials in the body, very often it's been physicians that have been quite creative.
translation.zh: 如果我们沿着时间的发展来思考整个历史进程中 人类是如何在人体上运用不同材料的， 我们会发现，频频出现的 是那些极具创意的医生，