electric hotbed

例句：

1. 1.The electric light bulb is easy to use and convenient.
   这个电灯泡使用起来很方便。
2. 2.Electric cars are becoming more popular in our city.
   电动汽车在我们的城市越来越受欢迎。
3. 3. The electric fence keeps the animals out of the garden.
   这个电栅栏把动物挡在花园外面。