光圈优先曝光 Aperture Priority Automatic-Exposure
光圈优先自动曝光 Aperture priority auto exposure ; AUTO
快门优先自动曝光 AUTO ; Tv
快门速度优先自动曝光 S Shutter Priority
就是先获得恰当的闪光曝光值，压下闪光曝光锁按钮，锁定这个曝光值。
FE lock is simply obtaining a proper flash exposure, pushing the right button to lock in that exposure.
他们搜寻的时候，是先对同一片天空拍摄4张照片，每次曝光间隔10分钟，然后在计算机屏幕上比较它们的差异。
They start by taking four pictures of the same patch of sky, with ten minutes between each exposure, and compare them on a computer screen.
随着曝光量的增加，其共振波长向长波方向移动，共振峰强度先增大继而减小。
With the increase of UV exposure, the resonance wavelength shifts toward longer wavelength and resonance peak intensity increases first and then decreases.
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