Last Updated：2025/12/07
Sentence
研究者たちは、一部の昆虫が交尾の際に生殖器を守るために陰茎の鞘を使うことを発見した。
Quizzes for review
Researchers found that some insects use penis sheaths to shield their reproductive organs during copulation.
See correct answer
Researchers found that some insects use penis sheaths to shield their reproductive organs during copulation.
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