【Earth&Sky】古老的带尖牙的“野猪-鳄鱼”型动物化石_英语听力练习mp3下载-自然-沪江听力酷

后台管理反馈贡献

【Earth&Sky】古老的带尖牙的“野猪-鳄鱼”型动物化石

听力简介：

听写填空,只写填空内容,不抄全文,3-5个句子,不用写标号,注意标点~

Paul Sereno: You're looking at an animal that is a cross between a boar and a crocodile. Never doubt the creativity of evolution!

You are listening to Paul Sereno, a paleontologist at the University of Chicago. At a 2009 science meeting, he showed me the unusual fossil that his team unearthed in a remote region of the Sahara Desert. [---1---]

Paul Sereno: [---2---] At the front end of the skull, it's got sort, kind of got a stub nose and a horny covering as if it was ramming itself forward in some way — [---3---]

This "boar-croc", said Sereno, is a relative of the modern crocodile, and lived in the African Sahara 90 million years ago, in an area which, back then, was a lush riverway.

Paul Sereno: The unusual features that we see in the boar-croc and all the other strange crocodilians — sometimes they are walking upright, sometimes they are eating plants — is because the crocodilians then were more than they are now, evolutionarily speaking. [---4---] So where you have an animal with fangs, it comes up, it's pretty quick. It can take down a fairly large animal — you might think of a lion, or you might think of a hyena, something that can crunch through bone. This was the animal — there were no hyenas and lions at that time.

【视听版科学小组荣誉出品】