顽固: stubborn, obstinate...
决心: determination, resolution, determined, firm and resolute, to make up one's mind...
心胸: heart, mind, ambition, aspiration...
型号: model (particular version of a manufactured article), type (product specification in terms of color, size etc)...
遗失: to lose, lost...
防治: to prevent and cure, prevention and cure...
只不过: only, merely, nothing but, no more than, it's just that......
罚: punish; penalize; punishment; retribution...
小学生: primary school student, schoolchild, beginner...
核实: to verify, to check...
