C2 [ I or T ] If you drain something, you remove the liquid from it, usually by pouring it away or allowing it to flow away, and if something drains, liquid flows away or out of it.(使)排出,(使)排放,放干(液体)
[ T ] If you drain a glass or cup, you drink all the liquid in it.喝光,喝完
More examples
They dug deep channels to drain the water from the fields.
That's just the sound of the water draining out of the sink.
You don't need to drain the rice, you see. It has absorbed all the water.
This entire region is drained by the Danube delta.
If there isn't a hole in the bottom of the plant pot, the water can't drain out.
C2 [ I or T ] to reduce or cause something to reduce使减少;使降低;消耗
[ I ] If the blood/colour drains from your face, or if your face drains (of blood/colour), you turn very pale, often because you are shocked or ill.(通常指因惊吓或疾病而脸色)变苍白
C2 [ C ] a pipe or channel that is used to carry away waste matter and water from a building, or an opening in the road that rain water can flow down排水管,下水道;下水井
the system of pipes, openings in the ground, or other devices that are used for carrying away waste matter and water下水管道,排水管线
[ C ] US UK plughole a hole in a bath, sink, etc. through which water flows away and into which you can put a plug排水管,排水口
More examples
Leaves are clogging up the drain.
Two kids were poking a stick into the drain.
[ S ] something that makes you feel very tired使人疲倦的事物
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