He made a difficult climb.

他作了一次艰难的攀登。

《新英汉大辞典》

It's not a difficult climb.

这次攀登并不难。

youdao

At first it was not a difficult climb, but then they came to a place which was not so easy.

开始并不难爬，但是后来他们来到一个不好走的地方。

youdao

At first it was not a difficult climb, but then they came to a place which was not so easy.

开始并不难爬，但是后来他们来到一个不好走的地方。

youdao