曝光量，是指物体表面某一面元接收的光照度Ev在时间t内的积分。
n. exposure
misc. quantity of illumination
检查快门速度光圈以确保正确的曝光量。
Check the shutter dial and aperture ring to make sure you have the correct exposure.
一般情况下，可以由相机来测定整个画面的光线亮度，并确定最佳曝光量。
In general, the camera to determine the whole picture of the radial brightness, and the optimum exposure.
不论是传统相机还是数码相机，拍摄时控制曝光量都是影响照片效果的关键。
Both traditional camera or digital camera, filming the exposure control is the key to influence the results.
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