• 1. net negative charge: 净负电荷
• 2. net negative charge numbers: 净电荷数

• 1.Where is the center of net negative charge in this molecule?
  分子的负电荷，中心在哪？
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• 2.The effect of this would be to educe the net negative charge and thus lower the repulsive force seen in Figure 1.
  这种方法会减少减少净负电荷，从而降低颗粒间的排斥力，如图1所示。
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• 3.So that means if we add up all of the formal charges within the molecule, what we would expect to see is that they sum up to give a net charge of negative 1.
  那么这就意味着如果我们把这个分子中，所有的形式电荷加起来，我们应该会看到它们加起来，之后得到的净电荷量为负一。
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