fade-in

例句：

1. 1. The movie fades in slowly as the lights go down.
   随着灯光变暗，电影逐渐开始。
2. 2. The sun was fading in through the trees.
   太阳透过树梢开始显现。
3. 3. The camera fades in on a close-up shot of the flower.
   相机对花朵的特写镜头逐渐聚焦。