Microraptor, from the Dromaeosaur family, was not an ancestor of birds, but it was also unlike any previously discovered feathered dinosaur.

虽然它并不是鸟类的祖先，但小盗龙和先前所发现的带羽毛恐龙并不相像。

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He thinks microraptor used its hind wings only for gliding, folding them out of the way for powered flight.

他认为，顾氏小盗龙仅仅用后翼来滑翔，在加力飞翔时，便折叠起来，以免挡道。

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Researchers originally suggested that Microraptor spread both arms and legs to the sides of its body to form two pairs of gliding wings.

研究人员最初认为，顾氏小盗龙从身体两侧伸展出前肢与后肢，形成两对滑行翼。

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