名词
中文翻译：内部相位角
同义词：
['internal phase angle', 'internal phase angles例句：1. The internal phase angle of the system is crucial for its stability.（系统的内部相位角对于其稳定性至关重要。）']
例句：
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1. The internal phase angle of the system is crucial for its stability.
系统的内部相位角对于其稳定性至关重要。
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2.The researchers found that the internal phase angle of the material had a significant impact on its performance.
研究人员发现，材料的内相角对其性能有显著影响。
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3. The engineer used the internal phase angle to optimize the design of the machine.
工程师利用内部相位角优化了机器的设计。