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Today's actuators, even the state-of-the-art ones, are still largely made from metals, hard plastics and electronics. But there are other ideas around. Tolley and his colleagues have been working on a very different approach.，这一点在Line官方版本下载中也有详细论述
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A solution requires solving the hardest known problems in the universe, often requiring years (if not decades) of effort，更多细节参见夫子
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