It has therefore become the focus for extensive study and research.

There have been extensive studies done upon children raised in such an environment.

It has since been the subject of extensive study and debate.

Any health claim would require extensive studies to support it.

The answer, extensive study has found, is that it depends on the power level of the plant.

Last year, a group of researchers carried out what may be the most extensive study on the subject to date.

After extensive studies in ancient culture, he returned to Iran for a short period.

After extensive study, it concluded that the company could get by on just 23 items.

We should care about it, and our departments have carried out an extensive study.

This interdisciplinary nature has led to extensive study in the past few decades.