Just send in the geometrist! - Geologist.

让几何学家进来 -是地理学家。

Julien thought that he had discovered one honest man in the whirlpool of this novel world. He was a geometrist named Gros, and had the reputation of being a Jacobin.

于连认为他在这个小说世界的漩涡中发现了一个诚实的人。他是一位名叫格罗斯的几何学家，享有雅各宾派的美誉。