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
v flow off gradually
v deplete of resources
v empty of liquid; drain the liquid from
v make weak
n. 消耗( drain的名词复数 ); 排水沟; 下水道孔盖; 流尽
v. （使）流干, （使）逐渐流走( drain的第三人称单数 ); 喝光, 喝干; 使（精力、金钱等）耗尽