Sentence examples for has always been difficult from inspiring English sources

Human cytomegalovirus (HCMV) genome manipulation has always been difficult.

His relationship with them has always been difficult.

Albert has always been "difficult and exacting, scornful of convention".

Anything relating to sex has always been difficult in China.

OLEG But my mother has always been difficult.

Dealing with Balkan conflicts has always been difficult.

Sea ice has always been difficult to monitor from space.

The challenge of tying science and social science is well known and has always been difficult.

Identification of Fusarium species has always been difficult due to confusing phenotypic classification systems.

But one sport has always been difficult to beam into fans' living rooms: sailing.

"Revenue recognition has always been difficult with these kinds of companies," Mr. Ciesielski said.