The truth is sometimes difficult to get at.

有时真相很难查明。

《牛津词典》

It's sometimes difficult to tell who are the goodies and who are the baddies.

好人和坏人有时很难分清。

《牛津词典》

The process I described above is sometimes difficult for me.

以上我写的这个过程有时候对我来说有些难。

youdao

Army Lieutenant Zacharia Davis,a nurse, says it was sometimes difficult to provide help quickly during the exercise, because of a lack of communication among military groups.

VOA: standard.2010.07.21

And this is actually, in general, why it's sometimes difficult to teach or to tell stories because we constantly overestimate how much other people know.

概而论之，这就是为什么有时候我们很难能讲一个故事,因为我们总是认为别人什么都猜到了。

耶鲁公开课 - 心理学导论课程节选

I guess living with roommates can be very difficult sometimes.

有时候跟室友一起住不是很方便。

找房子的方法 - SpeakingMax英语口语达人

Now I want you to think about one of those pesky, sometimes difficult to manage applications.

FORBES: Making the Cloud Less Cloudy for Educators

It is sometimes difficult to get answers and this is not always because of language barriers.

BBC: NEWS | Africa | Darfur aid worker's diary XVII

And we had to act quickly and make some bold and sometimes difficult decisions.

WHITEHOUSE: Twitter Town Hall