The normal atom has an exactly equal number of positive and negative charges, so that the atom as a whole is neutral.

正常原子中正负电荷数十完全相等的，所以从整体上看原子时中性的。

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These examples hence illustrate the importance of looking out for: negativity, a specific number, the whole or a proportion of, positive and negative connotation and reference to time.

这些例子搜寻以下枢纽词的重要性：否定词，详细的数字，限定范围的词，具有肯定或否定意义的词和时间指示词。

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These examples hence illustrate the importance of looking out for: negativity, a specific number, the whole or a proportion of, positive and negative connotation and reference to time.

这些例子搜寻以下枢纽词的重要性：否定词，详细的数字，限定范围的词，具有肯定或否定意义的词和时间指示词。

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