Considerable research and development has been done with this important plant.

Considerable research shows that students do better in small classes.

There has been considerable research into the question of low pay in agriculture.

How behavior affects health has been the subject of considerable research.

For the first four or five months, there is a very high mortality, he said, and no one knows why, despite considerable research.

"We'll be doing considerable research here to figure out what happened," he said, adding that the analysis would take months.

There is a considerable research and development happening throughout the world for this new technology.

Considerable research into modeling of these patterns has taken place.

Considerable future research needs to be conducted into health inequality.

Thus, considerable research has been applied to speeding up the problem.