Last year, Xu discovered another species of four-winged dinosaur, also at Liaoning.

去年，徐星又在辽宁发现了另一种四翼恐龙。

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Xu calls it a "four-winged" dinosaur because it had long, pennaceous feathers on its arms and legs.

因为其前后肢上都存在着较长的羽翮，因此徐星将它称之为“四翼”恐龙。

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Four-winged dinosaurs were ultimately a dead branch on the tree of life; they disappear from the fossil record around 80 million years ago.

四翼恐龙最终成为了生命之树上的灭绝分支；它们消失于8000万年前的化石记录中。

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The world number two was roared on by an adoring crowd, mindful of his wife's illness and the fact that four of his US Open misses have come in the New York area - at Winged Foot (2006), Shinnecock (2004) and Bethpage twice following his runner-up to Tiger Woods in 2002.

BBC: Mickelson keeps his perspective