Engineers who are developing new materials, materials that can be, if you think about it, there's not very many things that you would want to put in your eye and you'll feel comportable to put in your eye so this is a very safe, a very inert material.

工程师们不断研制新的材料,这些材料应该是,想想吧,能让你们敢于,放到眼睛里的,并令人感到舒适的材料并不多,这应该是一种非常安全非常稳定的材料

耶鲁公开课 - 生物医学工程探索课程节选

So they have to be engineered to be inert so that they can be safely inside a system and there's not every material you could pick would have that property.

缝合线必须是惰性的,以便确保植入人体后的安全性,不是随便哪个材料都能做到这一点

耶鲁公开课 - 生物医学工程探索课程节选