怎麼說呢？

怎麼說呢？這件事情很複雜。

How should I put it? This matter is quite complicated.

怎麼說呢，他人不壞，就是有點懶。

What should I say, he's not a bad person, just a bit lazy.

怎麼說呢？我覺得這個計畫還可以再改進。

How do I say this? I think this plan could still be improved.