save to fertilize soil

例句：

1. 1. We saved moneyby buying a used car.
   我们通过买一辆二手车节省了钱。
2. 2. Thegovernment is trying to savethe environment by reducing pollution.
   政府正试图通过减少污染来拯救环境。
3. 3. She saved up for months to buya new laptop.
   她攒了几个月的钱买了一台新笔记本电脑。