Sentence examples for studied before from inspiring English sources

The combustors studied before were annular or hollow cylinders.

Has this question ever been studied before, and if so, what did those studies show?

Research engine WoW has been studied before, but not in this context.

Beatboxing has been studied before, but usually with data from only a single performer.

However, the suitability of the species was not properly studied before planting them in Karachi.

The relationship between languages and identity has been studied before, but mainly in non-immersion contexts.

These problems (P1,P2,…,P10) have never been studied before in literature.

Given that marriage and happiness have been studied before, what makes your results unique?

Among these are many species and species groups that have not been studied before, like the pittas.

Scheduling for flows has been studied before.

This parameter has not been studied before.