他的父亲是当地政坛一位有影响力的人物。

His father was an ___influential figure in local politics.

尽管已经退休，她仍然是该行业中一个有影响力的声音。

Despite her retirement, she remains an ___influential voice in the industry.

这项研究对改变公共政策产生了影响。

The study was ___influential in changing public policy.