slowly的比较级：more slowly。

因为slowly是双音节词，并且它的组成结构是形容词+ly，这种形式的词的比较级构成方式一般在词前+more。slowly是一个英语单词，可以用作副词，可以翻译为缓慢的、慢吞吞的，等等。

slowly介绍

释义：

adv. 缓慢地，慢慢地

例句：

The turtle moves slowly along the coast.

乌龟在海岸慢慢移动。

We suggest that you speak slowly in your next speech.

我们建议你下次演讲的时候说慢一点。

The bride's father led the bride slowly towards the groom.

新娘的父亲牵着新娘慢慢地向新郎走来。

Cooling down slowly after exercise is important.

运动后慢慢降温是很重要的。

more slowly介绍

释义：

更慢些（slowly的比较级）

例句：

I often found myself telling my mom to drive more slowly, so that I could read all of the road signs we passed.

我发现我经常让妈妈开车开得再慢一点，这样我们就可以看清路上经过的所有路标。

Please could you speak more slowly?

请您说慢一点好不好？

Sound travels more slowly than light.

声比光传播得慢。