a bit more slowly

慢点！ （直译 就是多多慢点，慢多点）比如说开车的时候，你可以让司机慢点。

a bit more:

稍多的

例句与用法:
1. I don't understand your argument. Could you explain yourself a bit more?
我不明白你的论点，你能把意思再说清楚些吗？

2. Let's go upstairs where we can be a bit more private.
咱们上楼吧，那里没什麽外人。

3. I want to tan my back a bit more.
我想把后背晒得再黑点儿.

4. Come on, Sarah. Give me a bit more fair's fair!'
‘好了, 萨拉. 再给我一点--应当公平才是!’

5. The football team needs a bit more ginger in it.
这支足球队需要些活力.

6. Wet the clay a bit more before you start to mould it.
把泥再弄湿点再动手塑造.

稍微更慢些

more slowly,比较级
a bit/ a little bit 表示程度

你应该听过
much more slowly吧
这里a bit more slowly也是一样的
much或者a bit都是用来形容more的，前者是说more的‘很多’，后者表示more了‘一点’

更慢一些（副词）