fade-in

US /ˈfeɪd.ɪn/
UK /ˈfeɪd.ɪn/
"fade-in" picture
1.

淡入, 漸顯

a gradual increase in the visibility of an image or the volume of a sound in a film, television, or radio production

:
The scene began with a slow fade-in of the sunrise.
場景以日出的緩慢淡入開始。
We need a smooth fade-in for the background music.
背景音樂需要一個平滑的淡入