Natural language is created in comparison to mechanical language.

自然语言是相对于机器语言提出来的。

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They ranked the locations based on frequency of positive and negative words using the Mechanical Turk Language Assessment word list.

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Aside from mechanical challenges, what was missing that may have spurred personal robotics development was a dedicated programming language specifically for robot control and communication.

FORBES: Reflections on Personal Robots, Backwards and Forwards