sucking
  (a.)吸奶的,授乳的,尚未斷奶的,乳臭未乾的
  Suck v. t. [imp. & p. p. Sucked p. pr. & vb. n. Sucking.]
  1. To draw, as a liquid, by the action of the mouth and tongue, which tends to produce a vacuum, and causes the liquid to rush in by atmospheric pressure; to draw, or apply force to, by exhausting the air.
  2. To draw liquid from by the action of the mouth; as, to suck an orange; specifically, to draw milk from (the mother, the breast, etc.) with the mouth; as, the young of an animal sucks the mother, or dam; an infant sucks the breast.
  3. To draw in, or imbibe, by any process resembles sucking; to inhale; to absorb; as, to suck in air; the roots of plants suck water from the ground.
  4. To draw or drain.
     Old ocean, sucked through the porous globe.   --Thomson.
  5. To draw in, as a whirlpool; to swallow up.
     As waters are by whirlpools sucked and drawn.   --Dryden.
  To suck in, to draw into the mouth; to imbibe; to absorb.
  To suck out, to draw out with the mouth; to empty by suction.
  To suck up, to draw into the mouth; to draw up by suction or absorption.
  Suck·ing, a. Drawing milk from the mother or dam; hence, colloquially, young, inexperienced, as, a sucking infant; a sucking calf.
     I suppose you are a young barrister, sucking lawyer, or that sort of thing.   --Thackeray.
  Sucking bottle, a feeding bottle. See under Bottle.
  Sucking fish Zool., the remora. See Remora. --Baird.
  Sucking pump, a suction pump. See under Suction.
  Sucking stomach Zool., the muscular first stomach of certain insects and other invertebrates which suck liquid food.
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  sucking
       n : the act of sucking [syn: suck, suction]