pruning
  修剪,修枝,剪枝
  pruning
  修剪
  Prune v. t. [imp. & p. p. Pruned p. pr. & vb. n. Pruning.]
  1. To lop or cut off the superfluous parts, branches, or shoots of; to clear of useless material; to shape or smooth by trimming; to trim: as, to prune trees; to prune an essay.
     Taking into consideration how they [laws] are to be pruned and reformed.   --Bacon.
  Our delightful task
  To prune these growing plants, and tend these flowers.   --Milton.
  2. To cut off or cut out, as useless parts.
     Horace will our superfluous branches prune.   --Waller.
  3. To preen; to prepare; to dress.
  His royal bird
  Prunes the immortal wing and cloys his beak.   --Shak.
  Prun·ing n.
  1. The act of trimming, or removing what is superfluous.
  2. Falconry That which is cast off by bird in pruning her feathers; leavings.
  Pruning hook, or Pruning knife, cutting instrument used in pruning trees, etc.
  Pruning shears, shears for pruning trees, vines, etc.
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  pruning
       n 1: something that has been pruned off of a plant
       2: the act of trimming a plant