type A spermatogonium

例句：

1. 1. The studyof spermatogonium is crucial for understanding human fertility.
   研究精子对于理解人类生育能力至关重要。
2. 2. The doctor explained the type A spermatogonium's role in reproduction.
   医生解释了A型精子在生殖中的作用。
3. 3. The research on type A spermatogonium has led to new treatments for infertility.
   关于A型精子的研究已经导致了新的不孕治疗方法的出现。