It is improbable that she will go.

见得会走。

There is nothing inherently improbable in the idea.

这个想法本身没什么能的。

These new facts make the theory improbable.

这些新出现的事使这一理论变得荒谬。

The film tells the improbable story of a monkey that becomes a politician.

这部影片讲述了一个能发生的故事：一只猴子变成了一名政治家。

This is highly improbable.

这是完全能的。