英語(yǔ)聽(tīng)力：美洲大平原—20

This trail leads to the cave and the freshly dead bison, just out of reach.

Hunger makes the bear risk everything. He falls and joins the bison in its tomb. Now he can eat his fill. but after that there's no way out.

ln time he'll be just one more ice age specimen.

Outside, another group of predators head for their cave at dusk, pack hunters even more effective than the lion or the wolf.

Still relatively new here, they'll eventually transform the ice age plains, and build their own future by exploiting the herds of the American Serengeti. Even the giants that now dominate this ice age world will soon be gone. But they'll leave clues behind, and one day distant generations will pick up their trail and tell their story.

Next week on Wild New World, we discover why mammoths didn't make it through to modern times.

1 specimen

n.樣本，標(biāo)本

參考例句：

You'll need tweezers to hold up the specimen.你要用鑷子來(lái)夾這標(biāo)本。

This specimen is richly variegated in colour.這件標(biāo)本上有很多顏色。

2 predators

n.食肉動(dòng)物( predator的名詞復(fù)數(shù) );奴役他人者(尤指在財(cái)務(wù)或性關(guān)系方面)

參考例句：

birds and their earthbound predators 鳥(niǎo)和地面上捕食它們的動(dòng)物

The eyes of predators are highly sensitive to the slightest movement. 捕食性動(dòng)物的眼睛能感覺(jué)到最細(xì)小的動(dòng)靜。 來(lái)自《簡(jiǎn)明英漢詞典》

3 relatively

adv.比較...地，相對(duì)地

參考例句：

The rabbit is a relatively recent introduction in Australia.兔子是相對(duì)較新引入澳大利亞的物種。

The operation was relatively painless.手術(shù)相對(duì)來(lái)說(shuō)不痛。

4 herds

獸群( herd的名詞復(fù)數(shù) ); 牧群; 人群; 群眾

參考例句：

Regularly at daybreak they drive their herds to the pasture. 每天天一亮他們就把牲畜趕到草場(chǎng)上去。

There we saw herds of cows grazing on the pasture. 我們?cè)谀抢锟吹揭蝗喝旱呐Ｔ诓莸厣铣圆荨?/p>