| 例句 |
Electricity usage peaks during the summer.用电量在夏季达到最高峰。There are peaks and valleys in electricity usage during the summer.夏季的用电量有高峰也有低谷。It eats up electricity.它的用电量很大。There are peaks and valleys in electricity usage throughout the year.一年下来，用电量既有高峰，也有低谷。 |