difficultadj.困难的;艰难的;(人)难对付的;不易相处的
difficult conditions困难的条件
difficult definition难理解的定义
difficult swallowing吞咽困难
difficult to educate教育难
difficult assignment艰巨的任务
difficult experiment难做的实验
Difficult intubation困难插管
difficulties trouble困境
Difficult defecation排便困难
Difficult Situations困境