Sentence examples for are required to test from inspiring English sources

Public water supplies are required to test their water quality regularly.

Mr. Skinner said airlines are required to test the water on aircraft "periodically" and report any deficiencies to the E.P.A.

Additional studies are required to test this hypothesis.

Further studies using more models and basins are required to test the generality of these results.

Further experiments are required to test the effectiveness of the approach also under outdoor conditions.

Large water systems are required to test their drinking water for lead and copper every three years.

Further investigations are required to test this hypothesis.

Additional studies are required to test this possibility.

Further experiments are required to test these two hypotheses specifically.

Biochemical approaches are required to test these models.

Further studies are required to test these possibilities.