self-waterer

例句：

1. 1. We installed a self-waterer to ensure the plants always had enough water.
   我们安装了自给水器，以确保植物总是有足够的水。
2. 2. The self-waterer is an essential tool for maintaining a healthy garden.
   自给水器是维护健康花园的必要工具。
3. 3. The self-waterer was designed to be easy to use and maintain, making it ideal for small gardens.
   自给水器设计简单易用，非常适合小花园。