Point of absolute rest in a vibrating string we call a node.

一条绳子上绝对震动静止的点，我们称之为节点。

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You need absolute rest and avoid strenuous physical exertion.

你需要完全休息，避免重体力劳动。

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Point of absolute rest in a vibrating string we call a node.

一条绳子上绝对震动静止的点,我们称之为节点。

麻省理工公开课 - 固态化学导论课程节选

Though there isn't enough evidence to support absolute rest, mild activities that don't risk a repeat concussion may be part of management of the injury, the group said.

WSJ: Tougher Rules Advised for Athletes After Concussion