长慢慢 slow progress?

immediately i've got feedback that something's wrong.
seems that 长慢慢 is a bit of a half-way sentence.
Some say i should add something to it.
like 智慧长慢慢. which would mean knowledge grow slowly or something like that.
(thanks to Evonne for that)

well, in the case of this blog, it means my Mandarin language 长慢慢.
...How do I say that in Chinese? =/

How did this happen? 这是怎么回事呢？

At Chinese class today, which I take at the Coventry Chinese church,I learned a phrase.

It was such a long phrase, but its meaning was simple.

这是怎么回事呢？

It simply means how did it happen?

I had a rather lively teacher. The whiteboard next door fell down. We heard a 'crash!'.
Next moment we saw it and she quickly exclaimed,"This is when you may say,'这是怎么回事呢？"