3 sentences

1. 这些昆虫的生殖能力非常强。

   zhè​xiē kūn​chóng de shēng​zhí néng​lì fēi​cháng qiáng.

   These insects have a very strong reproductive capacity.

   Source: Dong Chinese Dictionary

2. 阴道是女性生殖系统的一部分。

   yīn​dào shì nǚ​xìng shēng​zhí xì​tǒng de yī bù​fen.

   The vagina is part of the female reproductive system.

   Source: Dong Chinese Dictionary

3. 阴茎是男性生殖系统的一部分。

   yīn​jīng shì nán​xìng shēng​zhí xì​tǒng de yī bù​fen.

   The penis is part of the male reproductive system.

   Source: Dong Chinese Dictionary