tank bottom water

例句：

1. 1.The tank bottom water is very clean and fresh.
   水箱底部的水非常干净和新鲜。
2. 2.The tank bottom water was used to fill the pool.
   水箱底部的水被用来填充游泳池。
3. 3.The tank bottom water was tested for contamination.
   水箱底部的水被测试以确定是否存在污染。