机器宇航员计划始于1996年，2000年该机器人的第一个原型正式亮相。
The Robonaut project began in 1996 and the first version of the bot came out in 2000.
安装在有轮距的2号人马座火箭上，美宇航局的2号机器宇航员重生为R2C2.这个机器人可以为深度探索太空起到侦查作用或者来协助宇航员太空行走。
The droid could be tasked to scout areas for potential crew visits or assist astronauts in spacewalks.
相比原始的机器宇航员，R 2最大的升级是拇指和整体速度；现在的拇指具有四个自由度(之前只有三个)，同时速度通过四个因素进行了提升。
The biggest upgrades from the original Robonaut are R2's thumb, which now have four degrees of freedom (as opposed to three), and its overall speed, which have improved by a factor of four.
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