ex·tru·sion /ɪkˈstruʒən/
 擠出,推出,趕出
 ex·tru·sion /ɪkˈstruʒən/ 名詞
 Ex·tru·sion n. The act of thrusting or pushing out; a driving out; expulsion.
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 extrusion
      n 1: something that bulges out or is protuberant or projects from
           a form [syn: bulge, bump, hump, gibbosity, gibbousness,
            jut, prominence, protuberance, protrusion, excrescence]
      2: squeezing out by applying pressure; "an unexpected extrusion
         of toothpaste from the bottom of the tube"; "the expulsion
         of pus from the pimple" [syn: expulsion]