1.Herein, a case of mixed gonadal digenesis is presented, and the literature is reviewed.

1.在此，我们提出一个混合型性腺发育不例，并做文献回顾。

2.Using anatomical method, the gonadal development in postembryonic period of Rana chensinensis, which had been migrated from Northeast China, is studied.

2.摘要采用解剖学方法，对南移后中林蛙胚胎后期性腺发育进行了观察。

3.Primary mediastinal germ-cell tumors (GCTs) without gonadal involvement are rare and can be divided into benign mature teratoma and malignant seminoma or nonseminoma.

3.摘要无生殖腺体原发性纵膈腔生殖芽细胞肿瘤为罕见肿瘤，一般分为性成熟畸胎瘤及包含精细胞瘤和非精细胞瘤在内恶性肿瘤。