It's just hard to believe he has improved this much this quickly.

我只是很难想象他进步得如此之快。

youdao

It is hard to believe that years ago, somebody else would just put her on medication (药物治疗) and tell her to calm down.

很难相信，多年前，别人只会让她吃药，告诉她要冷静下来。

youdao

So they find it hard to believe that some kids cut just because they think it's a way to seem tough and rebellious.

因此，他们发现很难相信，一些孩子自伤仅仅因为这是看起来强硬和叛逆的方式。

youdao

"It's just hard to believe that every abandoned house, every abandoned apartment, represents a family that never came back, " Miller said, shaking his head.

NPR: New Orleans: A Tale Of 2 Cities Since Katrina

It is just as hard to believe Clinton when he says nothing happened in the hotel, although when he denies her story in its possibly embellished form, he may have stumbled onto the truth.

CNN: Margaret Carlson On Sex And, ...Honesty. Honestly

That just seems hard to believe.

WHITEHOUSE: Press Briefing