First you go very fast, and then perhaps you slow up.

开始你说得很快，后来可能慢下来。

youdao

I slow up.

我放慢了脚步。

youdao

Slow up while the car is over the bridge.

汽车过桥时要放慢速度。

《新英汉大辞典》

He walked slowly [slow] up the path.

他沿着那条小路慢慢地走着。

youdao

He walked slowly [slow] up the path.

他沿着那条小路慢慢地走着。

youdao