Technology combining genetic engineering of cells with chemical engineering to create artificial organs and tissues such as skin, bone, heart valves, and cartilage for joints.
结合细胞遗传工程和化学工程以创造器官和组织如：皮肤、骨头、心脏瓣膜和软骨关节的技术。
2
However, there are several problems with artificial heart valves.
然而，对于人造心瓣膜来说还是有许多的问题。
3
Artificial mechanical aortic and mitral valves were intermittently sutured.