1.[T,I]排空；（使）流光；放干
2.[T,I]（使）流走，流出
3. 及物动词：喝光；喝干
4.[T,I]使（精力、金钱等）耗尽
n.
1. 可数名词：下水道；排水管
2. 可数名词：下水道孔盖
3. 可数名词：消耗；耗竭；耗费
词形变化
- 形容词 drainable
- 名称 drainer
- 时态 drained，draining，drains
- deplete of resources
- tube inserted into a body cavity (as during surgery) to remove unwanted material
- empty of liquid; drain the liquid from
- emptying something accomplished by allowing liquid to run out of it
- a gradual depletion of energy or resources
- flow off gradually
- make weak
- a pipe through which liquid is carried away