由于前帘呈闭合状态，在此过程中并没有光线进入相机。
At this stage no light has entered the camera, as the front curtain is still closed.
在一扇门帘前两个男人正在算着盘里的钱，帘上用彩灯拼了一行字：香檀咖啡。
Before a curtain, over which the words Café Chantant were written in colored lamps, two men were counting money on a salver.
在这样短的曝光下，后幕帘落下，在前幕帘完全打开前遮蔽感光元件。
For such short exposures, the rear curtain starts to fall, covering up the sensor before the front curtain is even fully open.
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