难染的

例句：

1. 1.I find it difficult to concentrate on the task at hand.
   我发现很难集中精力完成这项任务。
2. 2.The new software is difficult to use, but once you get the hang of it, it's quite intuitive.
   这款新软件很难使用，但一旦你掌握了它的用法，它就相当直观了。
3. 3.The project was difficult, but with teamwork, we were able to overcome the challenges.
   这个项目很困难，但通过团队合作，我们克服了这些挑战。