shredding
  椽底板條; 擊碎
  Shred, v. t. [imp. & p. p. Shred or Shredded p. pr. & vb. n. Shredding.]
  1. To cut or tear into small pieces, particularly narrow and long pieces, as of cloth or leather.
  2. To lop; to prune; to trim. [Obs.]
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  Shred·ding n.
  1. The act of cutting or tearing into shreds.
  2. That which is cut or torn off; a piece.
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  shred
       n 1: a tiny or scarcely detectable amount [syn: scintilla, whit,
             iota, tittle, smidgen, smidgeon, smidgin, smidge]
       2: a small piece of cloth or paper [syn: rag, tag, tag end,
           tatter]
       v : tear into shreds [syn: tear up, rip up]
       [also: shredding, shredded]