英语听力：探索发现 2012-09-21 长毛象王国 Mammoth—6
时间：2019-01-23 作者：英语课 分类：探索与发现2012年
英语课
In one remarkable 1 discovery recreated here, the head and hide of a large carcass was exposed – a unique opportunity for scientists to tap some Ice Age secrets. The remains 2 were of an extinct steppe bison, a longer-horned relative of the North American bison of today. An adult bull must have died and been immersed in silt 3 and mummified by the cold for thousands of years. Thick fat deposits found under the skin suggested that the bison did not starve to death and deep, wide scratch marks hinted at a violent end. An Ice Age predator 4 killed the bison, but which one?
Wolves are the bison’s major predators 5 in North America today. And they were certainly around during the Ice Age. Could they have been responsible?
Wolves hunt in packs, surrounding prey 6 and gradually exhausting it through constant hurrying and nipping. But there is no way they could have made these marks.
What about the grizzly 7 bear, another meat-eater that was around in prehistoric 8 North America? The grizzly can be an impressive hunter. But during the Ice Age, there was another even bigger bear -- the giant short-faced bear, the biggest bear that ever lived. So could a bear have made the scratch marks on the gold-mine bison?
adj.显著的，异常的，非凡的，值得注意的
- She has made remarkable headway in her writing skills.她在写作技巧方面有了长足进步。
- These cars are remarkable for the quietness of their engines.这些汽车因发动机没有噪音而不同凡响。
n.剩余物，残留物；遗体，遗迹
- He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
- The remains of the meal were fed to the dog.残羹剩饭喂狗了。
n.淤泥，淤沙，粉砂层，泥沙层；vt.使淤塞；vi.被淤塞
- The lake was almost solid with silt and vegetation.湖里几乎快被淤泥和植物填满了。
- During the annual floods the river deposits its silt on the fields.每年河水泛滥时都会在田野上沉积一层淤泥。
n.捕食其它动物的动物；捕食者
- 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。
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）
- 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》
n.被掠食者，牺牲者，掠食；v.捕食，掠夺，折磨
- Stronger animals prey on weaker ones.弱肉强食。
- The lion was hunting for its prey.狮子在寻找猎物。
adj.略为灰色的，呈灰色的；n.灰色大熊
- This grizzly liked people.这只灰熊却喜欢人。
- Grizzly bears are not generally social creatures.一般说来，灰熊不是社交型动物。
adj.（有记载的）历史以前的，史前的，古老的
- They have found prehistoric remains.他们发现了史前遗迹。
- It was rather like an exhibition of prehistoric electronic equipment.这儿倒像是在展览古老的电子设备。