困难的名词是difficulty；困难；难题；难事；困境；艰难；费劲；辛苦；困难程度；难度；
复数： difficulties
The changes were made with surprisingly little difficulty.
这些变化几乎没有遇到阻力，简直不可思议。
We found the house without difficulty.
我们轻而易举就找到了这栋房子。
The tasks have been ranked in order of difficulty.
按照困难程度对工作进行了分类。
Many clubs in the lower reaches of the league are in financial difficulty.
联盟下层的许多俱乐部都处于财政困难之中。
温馨提示：
