使画面渐显或渐隐使淡入使淡出通常与 in或out连用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
To gradually reveal or fade the picture, to fade-in or fade-out, usually used in combination with In or out. Fade-in and fade-out: the brightness of movies and TV shows gradually darkens; the sound of movies and TV shows gradually weakens; the sound of radio shows gradually weakens; image attenuation weakens; gradually disappears; fade fade
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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