使画面渐显或渐隐使淡入使淡出通常与 in或out连用图像衰减减弱逐渐消失渐淡变淡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
Make the picture gradually appear or fade, fade in or fade out, usually used in combination with in or out. Image attenuation, weakening, gradual disappearance, fading, fading in, fading out. The brightness of movies and TV shows gradually darkens, the sound of movies and TV shows gradually weakens, and the radio sound gradually weakens
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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