英语听力：自然百科 黄石公园的夏天 Yellowstone—7

 Hot water scorches¹ and drowns the roots of trees encroaching on the valleys. It can keep the forests in check and the rich pastures / open. Those pastures now produce the new grass needed to make rich milk and feed a bison baby boom. The few calves² born on the migration³ are now joined by hundreds of new youngsters. The predators⁵ have been waiting for this. Coyotes have a voracious⁶ reputation here. But on its own this one is certainly no match for a healthy bison and her calf⁷.

 

Pronghorn give birth to twins, each carefully cleaned to hide their smell from predators. While they are with her, they are relatively⁸ safe. And for now, the coyote is content with the afterbirth. But the mother pronghorn must leave her calves alone while she grazes. And with legs as wobbly as stilts⁹, their best defense¹⁰ is to lie low. She has young of her own to worry about, a demanding litter of nine, whose arrival has been carefully timed to coincide with an abundance of food.

 

But they are not top dog here. Yellowstone's top predator⁴, the wolf, dominated during the winter but is far less visible in summer. They prefer to stay close to well-hidden dens¹¹ to protect their pups from...

1 scorches   

烧焦，烤焦( scorch的第三人称单数 )； 使（植物）枯萎，把…晒枯； 高速行驶

参考例句：

• I have heard the taste that something scorches. 我闻到了什么东西烧焦的味道。
• The atmosphere is becoming thinner and strong sunlight scorches people. 臭氧层越来越薄，阳光越来越灼人。

2 calves   

n.(calf的复数)笨拙的男子，腓；腿肚子( calf的名词复数 )；牛犊；腓；小腿肚v.生小牛( calve的第三人称单数 )；（冰川）崩解；生（小牛等），产（犊）；使（冰川）崩解

参考例句：

• a cow suckling her calves 给小牛吃奶的母牛
• The calves are grazed intensively during their first season. 小牛在生长的第一季里集中喂养。 来自《简明英汉词典》

3 migration   

n.迁移，移居，（鸟类等的）迁徙

参考例句：

• Swallows begin their migration south in autumn.燕子在秋季开始向南方迁移。
• He described the vernal migration of birds in detail.他详细地描述了鸟的春季移居。

4 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。

5 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》

6 voracious   

adj.狼吞虎咽的，贪婪的

参考例句：

• She's a voracious reader of all kinds of love stories.什么样的爱情故事她都百看不厌。
• Joseph Smith was a voracious book collector.约瑟夫·史密斯是个如饥似渴的藏书家。

7 calf   

n.小牛，犊，幼仔，小牛皮

参考例句：

• The cow slinked its calf.那头母牛早产了一头小牛犊。
• The calf blared for its mother.牛犊哞哞地高声叫喊找妈妈。

8 relatively   

adv.比较...地，相对地

参考例句：

• The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
• The operation was relatively painless.手术相对来说不痛。

9 stilts   

n.（支撑建筑物高出地面或水面的）桩子，支柱( stilt的名词复数 )；高跷

参考例句：

• a circus performer on stilts 马戏团里踩高跷的演员
• The bamboo huts here are all built on stilts. 这里的竹楼都是架空的。 来自《现代汉英综合大词典》

10 defense   

n.防御，保卫；[pl.]防务工事；辩护，答辩

参考例句：

• The accused has the right to defense.被告人有权获得辩护。
• The war has impacted the area with military and defense workers.战争使那个地区挤满了军队和防御工程人员。

11 dens   

n.牙齿，齿状部分；兽窝( den的名词复数 )；窝点；休息室；书斋

参考例句：

• Female bears tend to line their dens with leaves or grass. 母熊往往会在洞穴里垫些树叶或草。 来自辞典例句
• In winter bears usually hibernate in their dens. 冬天熊通常在穴里冬眠。 来自辞典例句