3.In tracing the homologies of any part in different members of the same class, nothing is more common, or, in order fully to understand the relations of the parts, more useful than the discovery of rudiments.
在追溯同一纲不同成员的任何部分的同源性时,没有什么比发现胚芽更常见, 或者,为了充分理解各部分之间的关系, 更有
的了。机翻