One is to shed light on the complicated process of embryological development, which might eventually lead to treatments for some congenital diseases.

一是阐明胚胎发育的复杂过程，这最终可能导向对某些先天性疾病的疗法。

The importance of embryological characters and of rudimentary organs in classification is intelligible, on the view that a natural arrangement must be genealogical.

胚胎学特征和不发达器官在分类中的重要性是可以理解的， 因为自然排列必须是系谱学的。