1. A positive electric charge. 
   正电正电荷，阳电荷
2. There are two kinds of electric charges: positive and negative. 
   电荷有两种：正电荷和负电荷。
3. We believe that there are electrical charges of two kinds , called positive and negative , in each atom. 
   我们确认，每一个原子具有两种电荷：正电荷与负电荷。
4. An electron with a negative charge, as contrasted with a positron. 
   电子带有负电荷，与正电荷相反的电子
5. electric charge of particles 
   粒子电荷

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