sludge /ˈslʌʤ/
  軟泥,泥濘,泥狀雪
  sludge /ˈsləʤ/ 名詞
  淤渣,汙泥,游渣,泥流狀
  Sludge n.
  1. Mud; mire; soft mud; slush.
  2. Small floating pieces of ice, or masses of saturated snow.
  3. Mining See Slime,  4.
  4. Anything resembling mud or slush; as: (a) A muddy or slimy deposit from sweage. (b) Mud from a drill hole in boring. (c) Muddy sediment in a steam boiler. (d) Settling of cottonseed oil, used in making soap, etc. (e) A residuum of crude paraffin-oil distillation.
  Sludge hole, the hand-hole, or manhole, in a steam boiler, by means of which sediment can be removed.
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  sludge
       n 1: the precipitate produced by sewage treatment
       2: any thick messy substance [syn: slime, goo, gook, guck,
           gunk, muck, ooze]