困难的名词的英文单词difficulty；n.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。
