Cystic fibrosis is the commonest fatal hereditary disease.

囊性纤维化是最常见的致命性遗传疾病。

Cystic fibrosis is the most common fatal genetic disease in the United States.

囊肿性纤维化在美国是最常见的致命性遗传疾病。

Cystic fibrosis is life threatening.

囊性纤维化病会危及生命。

It is even possible he had undiagnosed cystic fibrosis.

他很有可能没诊断出囊性纤维化。

She was clueless about how to treat cystic fibrosis.

她处理囊肿性纤维化的时候笨的要命。