Larger feathers could have increased lift incrementally, until sustained flight was gradually achieved.

较大的羽毛可以逐渐增加升力，直到逐渐实现持续的飞行。

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Larger feathers could have increased lift incrementally, until sustained flight was gradually achieved.

较大的羽毛可以逐渐增加升力，直到逐渐实现持续的飞行。

youdao