The 20th century was the "age of the cyborg." You only need to look around to see things like artificial joints, hearing aids, and pacemakers. Other replacement parts are also being developed, like artificial hearts, cochleas, and retinas, and intelligent prosthetic limbs that can receive signals from the nerves.
「人機合一」時代機器人成為人體一部分，並沒有那麼遙不可及，人類在 20 世紀就已進入「人機合一」的時代，看看我們身上的人工關節、助聽器、心律調整器、各種移植的器官等，以及正在發展中的人工心臟、人工耳蝸、視網膜、能接收神經訊號的智慧型義肢等就能明白。