The sketch in handwork is good at catching ideas, and rich in the milk of human kindness, but freehand is defeated by computers in three-dimensional world.

• 徒手表达中的手绘草图能够快速捕捉思想、富有人情味,但传统手绘在表现三维效果图、尤其是细节表现上不如电脑效果图;