Judy is so reserved that it is hard to understand her.

朱迪非常内向，因而很难理解她。

youdao

This classical poem is hard to understand.

这首古诗很费解。

《新英汉大辞典》

But if not, the episode is hard to understand.

但如果真是他说的那样，那件事就难以理解。

youdao

Miz Cheek says the health care and finance industries are known for using language that is hard to understand.

VOA: special.2010.04.30

To use an ancient expression from the 1970's, which only John and I will appreciate, it's really hard to grok what that code is doing, to understand what it's trying to make happen.

我和约翰都会同意，70年代的一句话来概括，那就是很难理解编码的内容，以及它想要完成的工作。

麻省理工公开课 - 计算机科学及编程导论课程节选

So it is very hard to understand P's silence in this regard, if it stems entirely from the post-exilic, priestly circles.

很难理解P资源在这一方面的缄默，如果它来源于流放后时期，牧师圈子。

耶鲁公开课 - 旧约导论课程节选

Without one or more of the explanations above, it is hard to understand their current policies.

CENTERFORSECURITYPOLICY: Hamas rises in the West

It is hard to understand why Speaker Boehner would walk away from this kind of deal.

WHITEHOUSE: President Obama Speaks on Deficit Negotiations

It is hard to understand how both of these opposing kingdoms can exist within 10 blocks and 4 avenues of each other.

FORBES: The Mass Exodus from New York