1. She was of a helpless, fleshy build, with a frank, open countenance and an innocent, diffident manner. 她有着一副无用、肥胖的体型，一张老实、坦率的面孔，天真而不自信的举止。
2. The epistemological imperialism of modern science is a far cry from the cautious empiricism of Bacon and the diffident wisdom of Newton. 现代科学的认识论的帝国主义，与谨慎的实证主义的培根和缺乏自信的智慧的牛顿相距甚远。
3. Some people are born diffident, who may become more fear of mixing with others if they are not able to adjust their mental conditions during adolescence. 有的人生来性格内向，内向的人在青春期过程中如果不注意调整心理状态，就会变得惧怕与人交往。
