normal electrode

例句：

1. 1. The normal temperature for this region is 25 degrees Celsius.
   这个地区的正常温度是摄氏25度。
2. 2.He's a normal student; he doesn't have any special talents.
   他是个普通的学生，没有什么特殊才能。
3. 3. The normal distribution of income in this country is quite different from that in other countries.
   这个国家的收入分布与其他国家的正常情况大不相同。