Math is a difficult subject for some students. （数学对一些学生来说是一门难学的学科。）

The puzzle is so difficult that I can't solve it. （这个谜题太难了，我解不出来。）

Climbing the mountain in such weather is very difficult. （在这样的天气里爬山非常困难。）

Learning a new language can be difficult but rewarding. （学习一门新语言可能很困难，但也很有收获。）

He faced a difficult decision about his future. （他在未来问题上面临着一个艰难的决定。）

The task assigned to us is extremely difficult. （分配给我们的任务极其困难。）

It's difficult to find a parking space in this area. （在这个地区很难找到停车位。）

She found it difficult to express her feelings. （她发现很难表达自己的感情。）

The game becomes more difficult as you progress. （随着游戏进程推进，它变得越来越难。）

Running a marathon is a difficult challenge for most people. （对大多数人来说，跑马拉松是一项艰巨的挑战。）

Making friends in a new place can be difficult at first. （刚开始在一个新地方交朋友可能会很困难。）

The instructions are written in a difficult way. （这些说明写得让人难以理解。）

Solving this problem requires dealing with some difficult situations. （解决这个问题需要应对一些棘手的情况。）

We had a difficult time during the economic crisis. （在经济危机期间我们经历了一段艰难时期。）

It's difficult to keep up with the fast - paced changes in technology. （很难跟上科技的快速变化。）

The path through the forest is difficult to follow. （穿过森林的小路很难辨认。）

Teaching children with special needs can be a difficult job. （教有特殊需求的孩子可能是一项艰巨的工作。）

He has a difficult relationship with his father. （他和他父亲的关系很紧张。）

The exam questions were much more difficult than we expected. （考试题目比我们想象的要难很多。）

It's difficult to stay focused when there are so many distractions. （有这么多干扰因素时很难保持专注。）