名词

1. 吸;抽吸;吸出
    Suction is the process by which liquids, gases, or other substances are drawn out of somewhere.

2. (用医疗器械)抽吸，吸出
    If a doctor or nurse suctions a liquid, they remove it by using a machine which sucks it away.

3. (平面的)相吸
    Suction is the process by which two surfaces stick together when the air between them is removed.

1. the act of sucking

    Synonym: suckingsuck

2. a force over an area produced by a pressure difference