Clogged pipes caused drain water to back up into the room.
水管堵塞，排出去的水倒灌入室。
《新英汉大辞典》
2
Sometimes we can get away with finding a dark, enclosed ally-way to quickly drain the lizard on the walk back from the bar, but in some places this is simply not possible.
有时候，我们可以在回酒吧黑乎乎的封闭通道上快点解决一下，但是在一些地方，这根本就是不可能的。
3
If another log checkpoint record is encountered while it is in drain mode, it goes back to buffering mode.