pre·form /ˈpriˌfɔrm, (ˌ)priˈ/
  (vt.)預先形成粗加工的成品
  Pre·form v. t.  To form beforehand, or for special ends. “Their natures and preformed faculties. ”
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  preform
       v 1: form into a shape resembling the final, desired one
       2: form or shape beforehand or determine the shape of
          beforehand