头顶的天空开始转阴，然后渐渐黑了下来。

The sky above turns overcast, then steadily darkens.

youdao

轰鸣过后，车启动了，然后渐渐加速。

After a lot of noises, the car got started and gradually gained speed.

youdao

所以，如果你是个初入门者，那就先尝试只吃鱼肉，然后渐渐拒食所有肉类吧。

So if you are a beginner, try to start just eating fish then gradually go to no meat at all.

youdao

I told you, the way I'm going to teach any subject is going to start with the easiest example and lull you into some kind of security and then slowly increase the difficulty.

我之前讲过,我在上每一门课的时候,都是从最简单的例子开始,先打消你们的顾虑,然后渐渐加深难度

耶鲁公开课 - 基础物理课程节选