descensus paradoxu testis

例句：

1. 1.The anatomy of the human body is a fascinating subject to study.
   人体解剖学是一个令人着迷的研究对象。
2. 2. The physiology of sexual reproduction is a complex topic that requires careful study.
   性繁殖的生理学是一个复杂的话题，需要仔细研究。
3. 3.The descent of the testes into the scrotum is a natural process that occurs during puberty.
   睾丸下降到阴囊是青春期自然发生的过程。