名词
中文翻译：Unknown
同义词：
['Object', 'Receptor', 'Target', 'Subject']
例句：
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1. The scientist studied the DOF of the new material.
科学家研究了新材料的DOF。
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2. The robot's DOF is limited by its size and weight.
机器人的DOF受限于其大小和重量。
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3. The engineer optimized the DOF of the design to improve efficiency.
工程师优化了设计的DOF以提高效率。