Turn the following sentence into an inverted one.

把下列句子改成倒装句。

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When a pterosaur walked or remained stationary, the fourth finger, and with it the wing, could only turn upward in an extended inverted V-shape along each side of the animal's body.

当翼龙走路或静止时，第四指及其翼，只能向上翻转，成一个伸展且内翻的V型，在其身体两侧。

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