gravity-feed tank

例句：

1. 1. The gravity-fed tank is designed to collect rainwater for irrigation.
   重力供料罐设计用来收集雨水用于灌溉。
2. 2. The gravity-fed tank was installed at the top of the hill to collect water from the surrounding areas.
   重力供料罐安装在山顶上，从周围地区收集水。
3. 3. The gravity-fed tank is essential for maintaining a sustainable agricultural system.
   重力供料罐对于维持可持续农业系统至关重要。