vt.

1. 排出（液体）；使流出[（+away/off/out）]
   Ditches were dug to drain water from the swamp.

   挖渠排掉沼泽的水。

2. 排掉（土地，容器等的）水；晒干[（+off/of）]
3. 喝干
   He drained a bottle of beer.

   他喝光一瓶啤酒。

4. 耗尽[（+of）]
   The civil war drained the country of its manpower and wealth.

   内战耗尽了国家的人力和财富。

vi.

1. （水等）流掉，渐渐枯竭[（+away/off/out）]
   Luckily the water drained away in time.

   幸好水及时排掉了。

2. （土地）排水；（衣服等）滴干
   Put the raincoat on the balustrade to drain.

   把雨衣放在栏杆上去滴干。

n.

1. 排水管，下水道[C]
   The bathtub drain needs repairing.

   浴盆的下水道需要修理。

2. 排水设备[P]
3. 排水，流出[U]
   The cost of his children's education was a great drain on his money.

   他孩子的教育费用使他耗费极大。

4. 消耗，负担[C][（+on）]
   What he has spent is a drain on the savings of his parents.

   他所花费的会耗尽他父母的积蓄。

5. （财富等的）不断外流，逐渐流光[U][S1]

v.

1. cause the liquid in (something) to run out, leaving it empty or dry.
   ▸(of liquid) run off or out.
   ▸(of a river) carry off the superfluous water from (an area).
   ▸become dry as liquid runs off.
   ▸drink the entire contents of.
2. deprive of strength or vitality.
   ▸cause (a resource) to be used up.

n.

1. a channel or pipe that carries off rainwater or liquid waste.
   ▸Brit. a grating set in the ground over the opening of a drain.
2. a thing that uses up a resource.
   ▸the continuous loss of a resource:

   the drain of talented staff.