纪录片《侏罗纪之谜》 第27期 食肉恐龙的骨骼

Back at base, Oiver studied the most complete fossil he had from before the super-continent split up.

回到基地，Oiver开始研究他找到的最完整的大陆分裂前的骨骼

If the vicariance theory was right

如果地理分隔假说是正确的

then it should look very similar to its relatives in the Northern Hemisphere.

那么它必然与北半球的近亲非常相似

It is a medium sized meat-eating dinosaur¹ which,

它是中等体型的食肉恐龙

which still means that of course for our modern standards this would be a pretty enormous beast.

按照现在的标准来看，它仍然是庞然大物

The total length would probably be something like around five metres

它的腿骨全长大约有5米

which is two times the length of the modern tiger which is the largest land predator² that we have.

比当今最大的掠食动物--老虎还要长2倍

We know that animals of more or less this size move at something like 40km/h.

我们知道类似这种体型的恐龙奔跑速度大概是40公里/小时

It probably looked very much like the familiar allosaurus of North America.

它非常像我们熟悉的北美洲异特龙

The Argentinean dinosaur was an early ancestor of the predators³ that went on to dominant⁴ the late Jurassic,

阿根廷的恐龙是后来称霸晚侏罗世的掠食恐龙的先祖

but the crucial thing was that it was virtually identical to dinosaurs⁵ in the Northern Hemisphere

最关键的是，它实质上与北半球的恐龙是一样的

and this could only be the case if the dinosaurs were able to migrate freely between north and south.

唯一的可能就是当时南北方的恐龙能自由迁徙。

1 dinosaur   

n.恐龙

参考例句：

• Are you trying to tell me that David was attacked by a dinosaur?你是想要告诉我大卫被一支恐龙所攻击？
• He stared at the faithful miniature of the dinosaur.他凝视著精确的恐龙缩小模型。

2 predator   

n.捕食其它动物的动物；捕食者

参考例句：

• The final part of this chapter was devoted to a brief summary of predator species.本章最后部分简要总结了食肉动物。
• Komodo dragon is the largest living lizard and a fearsome predator.科摩多龙是目前存在的最大蜥蜴，它是一种令人恐惧的捕食性动物。

3 predators   

n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）

参考例句：

• birds and their earthbound predators 鸟和地面上捕食它们的动物
• The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》

4 dominant   

adj.支配的，统治的；占优势的；显性的；n.主因，要素，主要的人(或物)；显性基因

参考例句：

• The British were formerly dominant in India.英国人从前统治印度。
• She was a dominant figure in the French film industry.她在法国电影界是个举足轻重的人物。

5 dinosaurs   

n.恐龙( dinosaur的名词复数 )；守旧落伍的人，过时落后的东西

参考例句：

• The brontosaurus was one of the largest of all dinosaurs. 雷龙是所有恐龙中最大的一种。 来自《简明英汉词典》
• Dinosaurs have been extinct for millions of years. 恐龙绝种已有几百万年了。 来自《简明英汉词典》