clear sky noise temperature 晴空噪声温度
effective sky noise temperature 有效天空噪声温度
Attenuation and sky noise increase 衰减与天空杂讯之增加
sky background noise [天物] 天空背景噪声 ; 天空背景噪音
I heard a confused noise about me, but in the posture I lay, could see nothing except the sky.
咱听到在咱周围有混乱的噪音，但是以咱这样的躺姿，除了天空，是什么都看不到的。
The sky in the exposures was de-rotated to compensate for the rotation of Earth, then images were stacked together producing an image identical to a single exposure but with less digital noise.
曝光的天空被旋转着以补偿地球的自转，然后把一连串的图像叠放在一起，产生了与单一曝光相同的图像，可是很少有数码噪声。
Hundreds of birds fly in a sunny blue sky. The only sounds are bird calls and the soft noise made by tall grasses as the water slowly moves them.
无数的鸟在阳光明媚的蓝天中飞翔，这里你只能听到鸟的叫声以及当水流缓慢流经草的时候，这些草所发出的柔和的声音。
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