- 2018年05月29日12:54 来源：小站整理
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TPO 31 Sinosauropteryx 中华龙鸟
A fossil skeleton of a dinosaur called Sinosauropteryx, preserved involcanic ash, was discovered in Liaoning, China, in 1996. Interestingly, thefossil included a pattern of fine lines surrounding the skeletal bones. Some paleontologists interpret the lines as evidence that Sinosauropteryx had feathers. However, critics have opposed the idea that Sinosauropteryx was a feathered dinosaur, citing several reasons.
知识点：Reading开头段结构 — 背景介绍+ 提出观点。
写作总结：The readingpassage proposes that Sinosauropteryx did not have feathers.
First, the critics points out that the fine lines may not even represent functional structures of a living dinosaur, but rather structures that were formed after the animal’s death. After the animaldied and was buried in volcanic ash, its skin may have decomposed into fibers.The skin fibers then became preserved as lines in the fossil; the lines were misinterpreted as evidence of feathers.
知识点: Reading 中间段的中心句，通常位于段首，有时在段尾，偶尔没有。
归纳：线条是皮肤纤维而不是羽毛。( 该段中心句在段尾 )
写作总结：First, the writer believes that the lines might be skin fibers that were formed after the animal’s death.
Second, even if the fine lines are remains of real structure of a Sinosauropteryx, scientists cannot tell with certainty what part of the dinosaur’s anatomy the structures were. Many dinosaurs had frills, ornamental fan-shaped structures growing out of some parts of their bodies. Some of the critics argue that the lines surrounding the skeleton are much more likely to be fossilized remains offrills than remains of feathers.
归纳：线条是褶边的残留。 ( 该段中心句在段尾 )
写作总结：Second, the passage states that the lines were fossilized remains of frills instead of remnants of feathers.
A third objection is based on the fact that the usual functions of feathers are to help animals fly or regulate their internal temperature. However, the structures represented by the lines in the Sinosauropteryx fossil were mostly located along the backbone and the tail of the animal. This would have made the structures quite useless for flight and of very limited use in thermoregulation. This suggests that the lines do not represent feathers.
写作总结：Third, the author asserts that the location of the lineswould have made the functions of feathers, which are to sustain flying andthermoregulation, quite useless.