em·place·ment /-ˈplesmənt/
  安放,定位置,位置
  emplacement
  定位
  Em·place·ment n.  A putting in, or assigning to, a definite place; localization; as, the emplacement of a structure.
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  emplacement
       n 1: military installation consisting of a prepared position for
            siting a weapon
       2: the act of putting something in a certain place or location
          [syn: placement, location, locating, position, positioning]