名词
中文翻译：点电荷
同义词：
['point charge', 'point particle']
例句：
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1.The electrons in the atoms are like tiny point charges.
原子中的电子就像微小的点电荷。
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2.The electric field around a charged object is stronger at the point of contact.
带电物体周围的电场在接触点处最强。
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3. The point charge attracts the electrons towards it.
点电荷吸引电子向它移动。