forefront

Their company is at/in the forefront of research in this area. [=their company is a leader in research in this area]他们的公司在这个领域的研究位列前茅。

The discussion has brought the issue of health care to the forefront. [=has made the issue very important or well-known]这次讨论把卫生保健问题提到了重要位置。