举个例，他们根据现存的星椋鸟的毛色确定了一片有4.7亿年的羽毛有暗彩色光泽 。
They determined, for example, that a 47-million-year-old feather had the dark iridescent sheen found on starlings today.
虽然科学家们已经发现了更为精细的恐龙羽毛化石，但徐星表示，北票龙的这些羽毛结构依然堪称新奇。
More elaborate dinosaur feathers had already been found, but "these structures were novel, " says Xu, of Beijing's Institute of Vertebrate Paleontology and Paleoanthropology.
虽然科学家们已经发现了更为精细的恐龙羽毛化石，但徐星表示，北票龙的这些羽毛结构依然堪称新奇。
More elaborate dinosaur feathers had already been found, but "these structures were novel," says Xu, of Beijing's Institute of Vertebrate Paleontology and Paleoanthropology.
徐星发现的恐龙数量比当代任何科学家都要多，他表示，某些恐龙拥有鸟类特征，甚至长有羽毛。
Discoverer of more dinosaur species than any other living scientist, Xu Xing says some dinosaurs have birdlike traits, including feathers.
徐星发现的恐龙种类比任何当代科学家都要多，他表示某些恐龙拥有鸟类的特征，甚至长有羽毛。
Discoverer of more dinosaur species than any other living scientist, Xu Xing, with a cast of parrot-faced Psittacosaurus, says some dinosaurs have birdlike traits, including feathers.
徐星发现的恐龙种类比任何当代科学家都要多，他表示某些恐龙拥有鸟类的特征，甚至长有羽毛。
Discoverer of more dinosaur species than any other living scientist, Xu Xing, with a cast of parrot-faced Psittacosaurus, says some dinosaurs have birdlike traits, including feathers.
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