These caudofemoralis muscles provide the power stroke allowing fast forward movement.

这些肌肉组织（caudofemoralis）在动物高速前进过程中，为腿部提供了力量支持。

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Fast forward a few more years and the intellectual movement that came to be known as the Enlightenment brought with it a new respect for the rational and useful and an emphasis on education rather than privilege.

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Fast-forward 70 years to the modern anti-vaccination movement.

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