Its world line is tipped at the Angle corresponding to the speed of light.
它的世界线倾斜的角度与光速相对应。
High-speed applications under low light condition requires high sensitivity line scan CCD camera.
对于低照度、高速运动物体等的测量拍摄场合，往往需要高灵敏度的线阵CCD相机。
High-speed applications under low light condition requires high sensitivity line scan CCD camera.
对于低照度、高速运动物体等的测量拍摄场合，往往需要高灵敏度的线阵CCD相机。
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