淡入淡出电影电视亮度渐暗电影电视声音渐弱无线电声音渐弱图像衰减减弱逐渐消失渐淡变淡使画面渐显或渐隐使淡入使淡出通常与 in或out连用
Fade-in and fade-out: The brightness of movies and TV shows gradually darkens, the sound of movies and TV shows gradually weakens, the radio sound gradually weakens, image attenuation weakens, gradually disappears, fade, fade, making the picture gradually appear or disappear, fade-in, fade-out is usually used in combination with in or out
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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