drain

名词 drain:

1. emptying something accomplished by allowing liquid to run out of it
   同义词：drainage
2. tube inserted into a body cavity (as during surgery) to remove unwanted material
3. a pipe through which liquid is carried away
   同义词：drainpipe, waste pipe
4. a gradual depletion of energy or resources

动词 drain:

1. flow off gradually
   同义词：run out
2. deplete of resources
3. empty of liquid; drain the liquid from
4. make weak
   同义词：enfeeble, debilitate

1. The drains overflowed after the heavy rain.
   大雨过后，下水道溢出水来。
2. Boil the vegetables for 20 minutes and then drain off the water.
   把蔬菜煮上20分钟，然后把水沥掉。
3. This country is being drained of its best talents.
   这个国家最优秀的人才在不断外流。

drain

v.（动词）
drained,drain.ing,drains
v.tr.（及物动词）
To draw off (a liquid) by a gradual process:
排出：渐渐地放掉液体：
例句：
drained water from the sink.
将水从污水槽中排掉

To cause liquid to go out from; empty:
排干：使液体流掉；排空：
例句：
drained the bathtub; drain the pond.
放掉浴池的水；排净水塘的水

To draw off the surface water of:
排干表面的水：
例句：
The Mississippi River drains a vast area.
密西西比河枯竭了一大片区域

To drink all the contents of:
喝光：喝干内容物：
例句：
drained the cup.
干杯

To deplete gradually, especially to the point of complete exhaustion.See Synonyms at deplete
耗尽：逐渐耗尽，尤指消耗直至完全枯竭参见 deplete
To fatigue or spend emotionally or physically:
消耗：使在情感上或肉体上疲劳或消耗：
例句：
The day`s events completely drained me of all strength.
这天的事情使我精疲力竭

v.intr.（不及物动词）
To flow off or out:
排出：流掉或流出：
例句：
Gasoline drained slowly from the tilted can.
煤油慢慢从倾斜的油罐里流出来

To become empty by the drawing off of liquid:
变干：因液体流净而变空：
例句：
watched the tub slowly drain.
看着浴缸慢慢排空

To discharge surface or excess water:
注入：排走地面上的或多余的水：
例句：
The Niagara River drains into Lake Ontario. When flooded, the swamp drains northward.
尼加拉河流入安大略湖。发洪水时，沼泽向北泄水

To become gradually depleted; dwindle:
枯竭：被逐渐耗尽；减少：
例句：
felt his enthusiasm draining.
感到他的热情渐渐消失

n.（名词）
A pipe or channel by which liquid is drawn off.
排水管：排掉液体的管或通道
Medicine A device, such as a tube, inserted into the opening of a wound or body cavity to facilitate discharge of fluid or purulent material.
【医学】 引流管：插入伤口或体腔，以便排出液体或脓状物的装置，如管子
The act or process of draining.
排放：排去液体的行为或过程

A gradual outflow or loss; consumption or depletion:
流出：逐渐地流出或失去；消耗或耗尽：
例句：
the drain of young talent by emigration.
移民导致的青年人才流失

Something that causes a gradual loss:
消耗的东西：造成逐渐流失的东西：
例句：
interruptions that are a drain on my patience.
使我丧失耐心的插话

<习惯用语>down the drain
To or into the condition of being wasted or lost:
处于被浪费或丢失状态：
例句：
All of our best laid plans are down the drain.
我们所有精心布置的计划都付之东流

来源：
Middle English dreinen [to strain, drain]
中古英语 dreinen [拉，排出]
from Old English drôahnian
源自 古英语 drôahnian

【引伸】
drain.able
adj.（形容词）
drain.er
n.（名词）