正常光线向各个方向振动垂直的飞行；但是偏振光只有在一个平面上振动。
Regular light vibrates in all directions perpendicular to its direction of travel; polarized light, however, vibrates only in one plane.
飞机以接近海平面的机场高度开始飞行、爬升、巡航、下降和接近海平面的机场着陆。
The airplane starts its flight at an airport altitude near sea level, ascends, cruises, and descends to a landing airport near sea level.
卫星图像都是沿卫星飞行方向而获取的切平面投影图像。
All satellite image are tangent plane projection obtained along the flight direction of satellite.
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