名词
中文翻译：永久电荷
同义词：
['permanent current', 'permanent voltage']
例句：
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1. The battery has a permanent chargethat lasts for several hours.
这个电池有一个永久的充电量，可以持续几个小时。
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2. The electricmotor requires a constant supply ofpower to operate at full capacity.
电动马达需要持续的电力供应才能以满负荷运行。
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3. The permanent charge in thecapacitor is essential for maintaining itsfunctionality.
电容器中的永久电荷对于保持其功能至关重要。