PS版晒版时，需要控制的时间主要有抽真空时间、曝光时间和显影时间。
When proofing plates, is need to control the vacuum time, exposure time and developing time of PS version.
由于快门速度决定了光线照射传感器的时间长短，所以它也是用来控制曝光亮的手段。
Since the shutter speed determines the length of time that light hits the sensor, it will affect the overall exposure of the image by halving or doubling the exposure.
用激光回波脉冲控制电子快门来操纵摄像机的曝光时间，是抑制背景噪声的一种有效方法。
Steering exposure time of a camera through control electron shutter with laser echo pulse is an effective method for inhibiting background noise.
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