Virtual reality technology is a high man machine interactive technology which best simulates man's visual, audition and action by computer etc.
虚拟现实技术，即通过计算机等，最有效的模拟人在自然环境中视、听、动等行为的高级人机交互技术。
The model of machine product conceptual design under virtual environment already is not stay no longer stage of tradition's principle sign. But it should have audio-visual and sight.
虚拟环境下的机械产品概念设计模型已不再停留在传统的原理符号设计阶段，而应具有直观性和可视性。
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