平均测光 meaning in English

average metering

4 - segment flash metering , average metering and local - focus - area - aligned spot metering selectable in custom function ; automatically activated by pressing the ae - lock button , af button , or the shutter - release button partway down
可在自订设定功能中选择四区域测光、平均测光、个别对焦区连重点测光；按下自动曝光锁按钮、自动对焦按钮，或半按下快门释放按钮时会自动启动