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Pterosaurs also had a wing membrane that was supported by just one finger.
翼龙也有一个仅由一根手指支撑的翼膜。
You see, pterosaur wings have an elongated 4th digit that would have supported most of the wing membrane.
你看,翼龙的翅膀有一个细长的第四指,可以支撑大部分的翼膜。
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