fill-in light

基本解释

In this case I used a technique called fill-in flash to lighten the face, literally filling in the shadows with light.
在这种情况下，我使用内藏闪光灯来增加面部亮度，也就是说在阴影处填充光线。
zhyb0.blog.163.com
The United Arab Emirates selected the Alenia Aermacchi M-346 in February 2009 to fill a 48-aircraft order, including 20 in the light fighter version.
阿联酋于2009年2月选定的Alenia Aermacchi公司的M-346，以填补48架飞机的订单，其中包括20架轻型战斗机版本。
www.etiri.com.cn
(Sergey Riabsev / Wikipedia) The United Arab Emirates selected the Alenia Aermacchi M-346 in February 2009 to fill a 48-aircraft order, including 20 in the light fighter version.
阿联酋于2009年2月选定的Alenia Aermacchi公司的M-346，以填补48架飞机的订单，其中包括20架轻型战斗机版本。
www.etiri.com.cn

To get creative in challenging light, a built-in pop-up flash supplies extra lighting when capturing images in low-light situations or to provide a fill flash to eliminate shadows.
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