The level at the reference point is zero. 参考点的电平是零。
A condenser microphone always has the same output level as a dynamic microphone. 电容话筒的输出电平和动圈话筒一样高。
A region-based method for calculating local adaptation luminance was proposed to imitate the local adaptation mechanism. 提出了一个基于区域信息的局部适应亮度计算方法来模拟局部适应性。