Because there was so little bone left, the prosthesis was hard to fit, and with her right leg also damaged, walking was intensely painful.

因为那儿几乎没有骨头了，义肢很难装上去，而且她的右腿也有伤残，走路时疼痛无比。

youdao

Then in 2007 Dr Herr took this a step further by incorporating assistive power into an artificial leg, or prosthesis.

2007年，赫尔博士进一步为人造腿(或人造义肢)加上辅助电源。

youdao

Prosthesis: Artificial substitute for a missing part of the body, usually an ARM or leg.

假体：身体缺失部分的人造替代物，通常指假手和假腿。

youdao

Two years after the accident, he made the difficult decision to have his severely injured left leg amputated below the knee and replaced with a prosthesis made of carbon fiber and steel.

WSJ: Bionic Brains and Beyond