difficultyn.困难;争议;麻烦
difficulty of control难控性
difficulty of actions难度动作
difficulty coefficient难度系数
Difficulty mixed stain污染严重混合斑
difficulty in practice实践困惑
difficulty action type动作类型
difficulty of material材料难度
difficulty of drilling成孔困难
difficulty of articles文章难度
difficulty for driving驾驶难度