... ignitor 点燃剂；起燃剂；点火剂 illuminance level 照明度 illuminance 照明度 ...
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illuminance standard level 照度标准值
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。
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