electric boring machine

例句：

1. 1.The electric light bulbs are very bright.
   这些电灯泡非常亮。
2. 2. Electric cars are becoming more popular.
   电动汽车越来越受欢迎。
3. 3. The electric fence is a great way to keep the animals in.
   电动围栏是一个很好的保持动物在的方法。