虽然个别发现支持“地栖”学说，但同时也为鸟类起源增添了疑问。

A separate finding, though, supports the ground-up theory and adds to the debate over the birth of flight.

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这次只是一次相对小的做无用功的争论，只是关于进化树上靠近鸟类起源的小嫩枝的争论。

This is an argument over a relatively small rearrangement of some of the twigs on the evolutionary tree close to the origin of birds.

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中亚三叠纪和中国早白垩世的新的重要化石发现或许可以帮助解决有关鸟类起源的争议。

The controversy over the origin of birds may have been resolved through the discovery of new and remarkable fossils from the Triassic of Central Asia and the Early Cretacous of China.

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