Movie fans know that their action hero Superman does not really fly. And, in the movie Superman Returns, another visual trick is played on viewers. The man they see flying is not real. He is what is called a virtual actor. 电影迷都知道,他们的动作片英雄"超人"并不会飞.而电影<超人归来>又对观众玩了另一种视觉特技,观众看到的飞人并非真实的,而是所谓的虚拟演员.
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