名词
中文翻译：Unknown
同义词：
['relaxation time', 'relaxation period', 'relaxation interval', 'relaxation duration']
例句：
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1. The relaxation length of the material is crucial for its performance.
材料的松弛长度对其性能至关重要。
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2. During the relaxation period, the material will return to its original shape.
在松弛期间，材料将恢复其原始形状。
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3. The relaxation duration is typically measured in hours or days.
松弛时间通常以小时或天为单位测量。