她被公认为一位杰出的政治思想家。

She is regarded as a leading political ___thinker.

以赛亚·伯林是二十世纪一位有影响力的思想家。

Isaiah Berlin was an influential 20th-century ___thinker.

这次会议汇聚了顶尖的科学思想家。

The conference brought together leading scientific ___thinkers.