Sentence examples for research has been from inspiring English sources

The research has been slow.

Research has been done.

Vaccine research has been particularly vexed.

His research has been abundant.

Rigorous research has been scant.

research has been halted, pending investigation.

Their humanities research has been butchered.

Similar research has been performed by others.

Education research has been profoundly affected by narrowing achievement's meaning.

Heart-cell regeneration research has been controversial.

Much research has been done in the multicarrier system.