Sentence examples for is still a difficult issue from inspiring English sources

However, the design of a controller is still a difficult issue because of the material flexibility.

"Researching the resistance in the Channel Islands is still a very difficult and sensitive issue.

Race is still a delicate issue.

Screening is still a controversial issue.

In state space models, parameter learning is practically difficult and is still an open issue.

Surgical removal is recommended; however, its clinical diagnosis is still an issue because it is difficult to differentiate from lung adenocarcinomas using a tiny sample obtained from biopsy.

Effective blinding with feasible sham paradigms is still an unresolved issue in transcutaneous stimulation of cranial nerves and TENS making large-scale studies difficult.

It is still an ongoing issue".

"Race is still an issue".

"Plagiarism is still an issue.

Reliability is still an issue.