They were surprised to see that the missing part was regenerating .

他们惊讶地看到失踪的一部分，是再生。

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。

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.