450)=450"> 本文选自雅思听力Section 4，难度较大 Summary:本文是关于澳大利亚原住民的石刻画的专题报告。当地石刻画的发展经历了Dynamic, Yam和Modern三个时期。每一时期的特点都很明显，且与当地居民的生活习惯、周围环境以及历史发展阶段有紧密关系。最后提到，现代科学家正在探索许多画作中的抽象形象是源于何种生物。 HINTS Yam Aborigines Rainbow Serpent Ribboned Pipefish 全文听写，英式拼法 订阅节目更方便
The Yam period coincided with the end of the last ice age. This brought about tremendous change in the environment, with the sea levels rising and creeping steadily inland. This flooded many familiar land features and also caused a great deal of disruption to traditional patterns to life, hunting in particular. New shores were formed and totally different creatures would have washed up onto the sores. We studied 107 paintings of the Rainbow Serpent and found that the one creature that matches it most closely was the Ribboned Pipefish, which is a type of sea horse. This sea creature would have been a totally unfamiliar sight in the inland regions where the image is found and may have been the inspiration behind early paintings. So, at the end of the ice age there would have been enormous changes in animal and plant life. It's not surprising then, that the Aborigines linked this abundance to the new creatures they witnessed. Even today, Aborigines see the Rainbow Serpent as a symbol of creation, which is understandable given the increase in vegetation and the new life forms that featured when the image first appeared.