名词
中文翻译：自由电子密度
同义词：
['free electron concentration', 'free electron fraction']
例句：
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1. The measurement of free electron density is crucial for understanding the behavior of semiconductors.
测量自由电子密度对于理解半导体的行为至关重要。
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2. In the study of electronic devices, understanding the free electron density is essential for designing efficient circuits.
在研究电子设备时，理解自由电子密度对于设计高效的电路至关重要。
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3. The free electron density in a given material can vary significantly depending on the temperature and pressure conditions.
给定材料中的自由电子密度可以根据温度和压力条件显著变化。