n. emptying something accomplished by allowing liquid to run out of it
n. tube inserted into a body cavity (as during surgery) to remove unwanted material
n. a pipe through which liquid is carried away
n. a gradual depletion of energy or resources
n. 排水沟, 消耗, 排水
vt. 排出, 喝光, 耗尽
vi. 排水, 流干