drop well

例句：

1. 1. Theold well is still producing water after allthese years.
   这个老井这么多年来仍然在产水。
2. 2. They found a new well thatproduces more water than the old one.
   他们发现了一个比旧井产水量更多的新井。
3. 3. The well was dry when we arrived, but now it's full again.
   我们到达时井是干的，但现在又满了。