英語聽力：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，標本

參考例句：

You'll need tweezers to hold up the specimen.你要用鑷子來夾這標本。

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

2 predators

n.食肉動物( predator的名詞復數 );奴役他人者(尤指在財務或性關系方面)

參考例句：

birds and their earthbound predators 鳥和地面上捕食它們的動物

The eyes of predators are highly sensitive to the slightest movement. 捕食性動物的眼睛能感覺到最細小的動靜。 來自《簡明英漢詞典》

3 relatively

adv.比較...地，相對地

參考例句：

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

The operation was relatively painless.手術相對來說不痛。

4 herds

獸群( herd的名詞復數 ); 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上去。

There we saw herds of cows grazing on the pasture. 我們在那里看到一群群的牛在草地上吃草。