A hologram represents an object in three dimensions.全息图显示物体的三维立体图像。The planetarium's dome was designed to display data in three dimensions.天象仪的穹顶设计是用来在三维空间显示数据的。To Olga it seemed that she alone was a real person, in three dimensions.奥尔加觉得似乎只有她一人才是立体的真实的人。