It is difficult to cure some cancers.

一些癌症很难治好。

youdao

Have good governance body, heart is difficult to cure.

身体有恙好治，心病难医。

youdao

Although vitiligo is difficult to cure disease, but recovery still has a lot of patients.

白癜风虽是难治愈疾病，但痊愈的患者还是有很多的。

youdao

"And since it is so much more expensive and so much more difficult to cure, that would be a catastrophe."

VOA: standard.2009.12.09

To cure difficult cancers of the colon, pancreas and lung may require "cocktails" of new drugs, each attacking the tumor in a different way.

FORBES: Targeting Tumors

Renal cell carcinoma accounts for approximately 2% of all cancers diagnosed in the UK, although it is difficult to treat, with a cure rate of about a third.

BBC: Regular painkiller use linked to cancer

Only by understanding the subtle genetic variations among hundreds of thousands of people--by sifting out the molecular misnomers that predispose someone to a particular malady--will scientists learn how to better predict, diagnose and ultimately cure difficult diseases like diabetes, schizophrenia and heart failure.

FORBES: Magazine Article