Cylindrical "forearms" house small electric motors, known as actuators, which pull on metal tendons that move the fingers with precision.
Artie Beaty, Contributing WriterContributing Writer，这一点在91视频中也有详细论述
先理解原理：看动图 + 手动模拟小数组，更多细节参见WPS官方版本下载
For him, it was an image that changed our world forever. He put his thumb against the window and the whole world disappeared behind it. It was the most moving experience of his life.