difficult[ˈdifikəlt]

adj.困难的，难相处的
◇be difficult to do sth.=be difficult of难以做
‖ difficult of access难攀登的
difficult points难点问题
difficulty n. 困难，难事，难点
◇in difficulty经受困难
make difficulties反对，表示异议
with difficulty好容易才…/ without any difficulty毫不费力地
difficulty degree point难度分
difficulty dive跳水难度动作
difficulty index难度指数
difficulty level难度水平
difficulty rating按难度分等级
difficulty score难度分数
difficulty test难度测试
difficulty value难度值
difficulties for money手头经济拮据