虚拟键盘就相当难触击，常用按键应该能随时可访问，同时又不侵占有限的屏幕大小。
Virtual keyboards are pretty difficult to touch type and often used keys should probably be accessible without eating the already limited screen real estate.
人体运动在电影制作、视频游戏、虚拟现实应用以及拟人机器人控制中都占有非常重要的地位。
Human motion has played a very important role in file production, video games, virtual reality applications, and control of humanoid robot.
三维地形场景实时绘制在虚拟现实、地理信息系统、仿真系统等领域中占有十分重要的地位。
The rendering of 3D terrain scene is playing a key role in many research fields such as virtual reality, geographic information system and simulation system, etc.
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