Experimental results show that the conception of chatter-free machine tools is feasible and effective.

试验表明，这种无颤振的机床技术思想与方法是可行的和有效的。

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It's an air cleaning machine connected to a bicycle and is part of the Smog Free Project.

这是一台连接到自行车上的空气净化机，是雾霾净化项目的一部分。

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Ensure there is a free flow of air around the machine.

要确保机器周围空气畅通。

《牛津词典》

No machine could do this because our capacity for language is unbounded and free.

机器并不具备语言能力,因为我们的语言能力,是不受控制的,是自由的

耶鲁公开课 - 心理学导论课程节选

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