这份坦然，或许也来自家人给的底气。她早早告知父母，如果游戏还是做不出来，可能要把老家的房子也抵押出去。父母没有反对，只是默默支持。去年刚退休的父亲，甚至把一半退休金悄悄转给了她，支撑着她的日常开销。她从未提过自己的经济困境，父亲只是转来了那笔钱，什么也没说。
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And, if a robot arm were to swing out towards you, for safety reasons you would want to be able to immediately stop it and push it back without harming yourself, reverse that motion instantly. For one thing, that requires a back-driveable actuator.
Author(s): Qin Qin, Yawen Hua, Luyao Hai, Meidie Wu, Siqi Jiang, Rongxing Ye, Jiangfeng Song, Yiliang Liu, Linsen Zhou