以下为句子列表：
英文: In essence, the beam pushes the lighter electrons away from the heavier positive ions, which in turn get left behind, creating a region of excess positive charge and a region of excess negative charge [see box above].
中文: 基本上，这会将较轻的电子从较重的离子中推开，这时候较重的离子会略为落后，而创造出一个带有较多正电荷的区域及另一个带有较多负电荷的区域（参阅上方〈在电子泡泡里〉）。
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英文: The process works in this way: A plasma as a whole is electrically neutral, containing equal amounts of negative charge (electrons) and positive charge (ions).
中文: 过程是这样的：电浆整体而言是电中性的，具有一样多的负电荷（电子）及正电荷（离子）。
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英文: Therefore, electrons cannot be pictured as localized particles in space but rather should be thought of as cloudsof negative charge spread out over the entire orbit.
中文: 因此电子不能描述为空间所处位置的微粒，只能认为负电荷占整个轨道扩散开来的“云”。
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