adj.顽强的；顽固的；精明的；讲究实际的
They had fought hard for equal rights. 他们为了获得平等权利已经进行了顽强的斗争。
However, in a long hard season, character counts for a lot. 然而在漫长的一个赛季中，顽强的性格相当重要。
Because their hearts had turned hard, stubborn and obstinate. 重点是在于他们的心已经是硬的，是固执的，是顽固的。
But ignorance and misinformation about the health hazards of beryllium die hard. 关于健康的破坏物铍的无知和误传是很顽固的。
