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劍橋雅思14真題聽力 第13期:Test2(section3-1)

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So, Rosie and Martin, let's look at what you've got for your presentation on woolly mammoths.

好的,羅希和馬丁,讓我們來看一下你們關于猛犸象的展示準備的怎么樣了吧。
OK, we've got a short outline here.
好的,我們準備了一個簡短的大綱。
Thanks. So it's about a research project in North America?
謝謝,所以這是在北美洲的一個研究項目嗎?
Yes. But we thought we needed something general about woolly mammoths in our introduction, to establish that they were related to our modern elephant, and they lived thousands of years ago in the last ice age.
是的,但是我們覺得我們需要在介紹部分說一些猛犸象的概括性的知識,以此建立它們與現今的大象的聯系,它們生活在幾千年的冰川時代。
Maybe we could show a video clip of a cartoon about mammoths. But that'd be a bit childish. Or we could have a diagram, it could be a timeline to show when they lived, with illustrations?
可能我們會放一段猛犸象的視頻片段。但是那有點點太幼稚了。或者是我們可以畫一張圖表,可以是它們生存的時間軸,可以帶著插圖?
Or we could just show a drawing of them walking in the ice? No, let's go with your last suggestion.
或者是我們可以展示一張它們在冰川中漫步的圖畫?算了,我們還是采取你最后一個建議吧。
Good. Then you're describing the discovery of the mammoth tooth on St Paul's Island in Alaska, and why it was significant.
好的。然后你們會描述阿拉斯加圣保羅島上發現的猛犸象,以及這件事為什么非常重要,是吧。
Yes. The tooth was found by a man called Russell Graham. He picked it up from under a rock in a cave. He knew it was special -- for a start it was in really good condition, as if it had been just extracted from the animal's jawbone. Anyway, they found it was 6,500 years old.
是的,一個叫做Russell Graham的人發現了象牙。他從一個洞穴里的巖石下面找到了牙齒。他知道它很特別,因為剛開始的時候它保存非常完好,好像剛從動物的頜骨上弄下來的。不管怎么樣,他們發現它是來自于6500年前的。
So why was that significant?
所以為什么那很重要呢?
Well the mammoth bones previously found on the North American mainland were much less recent than that. So this was really amazing.
呃,在北美大陸之前發現的猛犸象牙要比這個象牙要早很多。所以這個真的非常了不起。
Then we're making an animated diagram to show the geography of the area in prehistoric times. So originally, St Paul's Island wasn't an island, it was connected to the mainland, and mammoths and other animals like bears were able to roam around the whole area.
然后我們會做一個動畫圖表,展示這片地域史前的地理狀況。剛開始的時候,圣保羅島嶼并不是一個島嶼,它是和陸地相連接的,猛犸象和其他的動物,比如說熊都可以在整個地區游蕩。
Then the climate warmed up and the sea level began to rise, and the island got cut off from the mainland. So those mammoths on the island couldn't escape; they had to stay on the island.
然后氣溫升高,海平面開始上升,這個島嶼就和陸地分離了。所以陸地,上的猛犸象沒法逃脫:它們得留在陸地上。
And in fact the species survived there for thousands of years after they'd become extinct on the mainland.
其實在它們在陸地上滅絕之后,這種生物還是在島嶼上繼續生存了幾千年。
So why do you think they died out on the mainland?
那你們覺得為什么它們會在陸地上滅絕呢?
No one's sure.
大家都不是很確定。
Anyway, next we'll explain how Graham and his team identified the date when the mammoths became extinct on the island. They concluded that the extinction happened 5.600 years ago, which is a very precise time for a prehistoric extinction. It's based on samples they took from mud at the bottom of a lake on the island. They analysed it to find out what had fallen in over time -- bits of plants, volcanic ash and even DNA from the mammoths themselves. It's standard procedure, but it took nearly two years to do.
不過,我們接下來會解釋Graham和他的團隊是如何確定猛犸象在島嶼上滅絕的時間的。他們說滅絕大概發生在5600年前,對于史前的物種滅絕而言,這個時間已經非常精確了。這是基于他們從島嶼湖底所采的泥土樣本所做出的。他們對其進行了分析,來找出隨著時間流逝什么東西出現了--植物,山灰,甚至是猛犸象自己的DNA。這是個非常標準的程序,但是整個過程需要兩年的時間。

重點單詞   查看全部解釋    
identified

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adj. 被識別的;經鑒定的;被認同者 v. 鑒定(id

 
precise [pri'sais]

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adj. 精確的,準確的,嚴格的,恰好的

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extinct [iks'tiŋkt]

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adj. 滅絕的,熄滅的,耗盡的

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prehistoric ['pri:his'tɔrik]

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adj. 史前的
=prehistorical

 
procedure [prə'si:dʒə]

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n. 程序,手續,步驟; 常規的做法

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presentation [.prezen'teiʃən]

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n. 陳述,介紹,贈與
n. [美]講課,報告

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volcanic [vɔl'kænik]

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adj. 火山的,猛烈的

 
escape [is'keip]

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v. 逃跑,逃脫,避開
n. 逃跑,逃脫,(逃

 
extinction [iks'tiŋkʃən]

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n. 消失,消減,廢止

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outline ['əutlain]

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n. 輪廓,大綱
vt. 概述,畫出輪廓

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