brightness level
n. 亮度级
例句与用法：
The act or an instance of gradually diminishing in brightness, loudness, or strength until actual disappearance occurs.
逐渐消失在亮度、响度或精力上逐渐减弱直至全部消失的活动或例子
A unit of retinal illumination, equal to the amount of light that reaches the retina through 1 square millimeter of pupil area from a surface having a brightness of 1 candela per square meter.
光度视网膜亮度单位，相当于每平方米有一烛光亮度的表面，通过一平方毫米的瞳孔区域，到达视网膜的光线数量
Stars vary in brightness.
星星光亮度不同。
The light hurt my eyes with its brightness.
明亮的灯光刺痛了我的眼睛。
词形变化：