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1·The incurability of his optimism .

他的盲目乐观不可。

2·The early detection and treatment is the most effective way to prevent incurability of pulmonary diseases.

对于肺部疾病的早期检测与治疗，是预防和治疗肺部疾病最有效途径。

3·Due to exaggerated talk about the incurability of the disease, the risk of transmission and mortality rate, people remain horrified by the disease. the gravity of the disease has been overstated.

由于过度强调艾滋病不能被治愈，以及夸大传染和死亡率的风险，人们仍然对艾滋病深怀恐惧。