The transition from school to work can be difficult.
从在学校念书到上班工作，这一转变有时候可真不容易。
We've done the difficult part of the job.
我们已完成了工作的困难部分。
Legislation will be difficult and will take time.
立法既费力又耗时。
Some people find this more difficult than others.
这件事有人觉得难，有人觉得不难。