He said that the spines may serve as a "one-way road to learn how to mate" and once used they are no longer needed.

  • 他说,脊髓组织也许是“学习如何性交的单行道”,一旦被使用过,它们就不再被需要。

  • 互联网摘选 2025-01-20 12:59:20

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