今天冷得了不得。

It's extremely cold today.

他高兴得了不得。

He is incredibly happy.

他力气大得了不得。

His strength is extraordinary.

不是什么了不得的过失

not a terribly serious mistake

这有什么了不得。

What's so extraordinary about this?

这没有什么了不得。

There's nothing extraordinary about this.

体制改革是一件了不得的大事。

Reform of the system is a huge matter.

可了不得，汽车把小孩碰伤了。

How awful, a car injured a child.