如何温和或强烈地表达不同意

Yes, that's quite right, but it is perhaps not the policy that has gone wrong.

是的,十分正确,但是或许并不是政策上的错误.

Well, you have a point here, but don't you think it plays an important role in the process.

你说得有道理,但是难道你不认为它在整个过程中起了重要的作用吗?

I'm not really sure if I would agree with you on that.

在这一点上我不太确定是否应该同意你.

I'm afraid I don't quite agree.

恐怕我不怎么同意.

What you have said may be true, but I tend to think it another way.

你所说的可能是对的,但是我倾向于认为从另一个角度考虑.

Yes, there are certainly elements of truth in what you say, but isn't it also true to say that they are not working hard enough?

是的,你说的也有正确的地方,但是说他们不够努力不是也很对吗?

Personally I don't think much of it.

我个人可不敢恭维.

Are you absolutely sure?

你完全确信吗?

Well, you don't seem to realize that she is correct.

你似乎并没有意识到她是准确无误的.

No, I disagree with you entirely.

不,我完全不同意.

I think you're mistaken here.

我想你错了.

I couldn't agree with you less.

我是实在不能同意.

You must be joking!/Are you kidding?

你一定是在开玩笑!/你是在开玩笑吗?