在研究中，参加者被要求模拟一个前臂的60度运动，在计算机屏幕上划过一条波浪线。

In the study, participants were asked to mimic a 60-degree forearm movement that was represented as a wavy line on a computer screen.

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签字区有一条呈波浪线的背景。

Signature area contains a wavy line background.

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签字区有一条呈波浪线的背景。

Signature area contains a wavy line background.

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