incurable

Advanced stages of certain cancers are still considered incurable by modern doctors.

(Chinese) 某些癌症的晚期阶段仍被现代医生认为是无法治愈的。

He is an incurable romantic who still writes handwritten love letters every week.

(Chinese) 他是个无可救药的浪漫主义者，现在每周还会写手写的求爱信。