说明：  在许多情形中，3D图形对现实生活中那些昂贵的、危险的或者不可能的情形提供了非常有效的替代。最精彩的例子就是飞行模拟和医疗成像。这两类技术在工业中都得到了相当大的应用
(In many cases, 3D graphics on the real life of those expensive, dangerous or impossible for the case of a very effective alternative. The best example is the flight simulation and medical imaging. These two types of technology in the industry have been considerable application)