Relatively few firms today can manufacture actuators at scale with a high level of precision, and these components are still a long way from the incredibly engineered muscles that allow animals to move with such grace and efficiency.
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而 MacBook 那个比鼠标还好用的触控板，不仅基础的拖动点击都指哪打哪，还支持各种实用的手势，某种程度也承担了触控屏的作用。
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