常见例句用作形容词 (adj.)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。 返回 hard-shell