每天早上五点钟起床太难了。

It was hard going getting up at five every morning.

《牛津词典》

把事实和数字硬灌输给疲惫的学生太难了。

It's difficult to pump facts and figures into tired students.

《牛津词典》

如果练习太难，学习者就可能感到很没信心。

Learners can feel very discouraged if an exercise is too difficult.

《牛津词典》

New thresholds, new anatomies", ; well, that's not such a hard concept; that's an image of what the modern promises for Crane, and indeed those Gothic arches of the bridge seem to emblematize for him.

新的开端，新的躯体“,这并不是太难的概念;,这就是对于克莱恩而言现实希望的肖像，实际也是，布鲁克林桥上那些哥特式的拱门与他而言的象征。

耶鲁公开课 - 现代诗歌课程节选

But it's difficult, because you have to go there like four or five times a week.

但是要坚持学习真实太难了，你一周得去四、五次。

I used to实战 - SpeakingMax英语口语达人

Because you don't know how much more time you've got-- You can make a guess based on statistics, but as we saw, there's wild unpredictability.

因为你不知道你剩下多少时间-,你可以根据数据进行猜测，但是我们都知道，不可预见性太难把握。

耶鲁公开课 - 死亡课程节选