节约装置

例句：

1. 1.We should always be saving for a rainy day.
   我们应该总是为下雨天存钱。
2. 2.The government is promoting the concept of saving energy.
   政府正在推广节约能源的概念。
3. 3. She saved up her money for a new car.
   她攒钱买了一辆新车。