Mr. Dodge was a doctor, and he was the path breaker of pathology.

道奇先生是名医生，他是病理学的开路人。

Many of the later immigrants, in their search for cheap lands, were compelled to go to the border; but in a large part the path breakers to the West were native Americans of the second and third generations.

许多后来的移民， 为了寻找便宜的土地，被迫前往边境；但在很大程度上， 开拓西方道路的是第二代和第三代的美洲原住民。