纸上或屏幕上的地图是平面的；它们需要从地球的曲面向平面进行转换：地图投影。
Maps (on paper or on the screen) are flat surfaces; they require a transformation from the curved surface of the earth to the flat plane: a map projection.
受训者不再感到他们面向真实患者的热情，他们或许开始视医学专业为一门职业。 人们在计算机屏幕前用处方签行医。
When trainees don't feel the passion of tending to the realpatient, they may come to see the profession of medicine as a trade practiced before a computer screen with a prescription pad.
经典：这台75年历史的电视机有一个12寸的屏幕，周身为胡桃木和红木打造，电视画面(从箱子里面向上照射)通过顶盖上的一面镜子反射到观众的视野里来。
Classic: the 75-year-old set comes with a 12-inch screen and is contained in a walnut and mahogany case with the picture being reflected onto a mirror that opens from the top.
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