low light短语⁴⁸²⁵¹ 基本例句 微弱光线 Low light level TV is usually operated under extremely low illuminance or other adverse circumstances and the output SNR decreased to such a level that possibility of detection is greatly reduced. 微光电视工作于极低照度或恶劣环境下，输出信噪比明显降低，目标完全淹没在背景噪声中，使探测率大大下降。 cnki