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1. The anatomy of the genital organs is a fascinating topic in human anatomy.
人体器官的解剖学是一个引人入胜的话题。
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2. The study of sexual reproduction is essential for understanding the evolution and diversity of life on Earth.
研究性生殖对于理解地球上生命的起源和多样性至关重要。
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3. In some species, the external reproductive organs are modified to facilitate mating behaviors.
在一些物种中,外部生殖器官被修改以促进交配行为。