英语听力：自然百科 澳大利亚大堡礁 Great Barrier Reef—13

 Eighteen million years ago, it arrived in warm, tropical waters. Only then could the world's greatest reef be born. Australia's epic¹ journey may have created perfect conditions for coral, but it also put it in the line of fire of the most powerful storms on the planet.

 

For thousands of years, the conditions that created the world's largest living thing have been in perfect balance. Even the elements here work in harmony to build the reef. Situated² in the tropics, the sun hits the water at an angle so precise that almost no heat is reflected, but is absorbed into the warm, fertile waters.

 

But not everything here is so benign³. Some of nature's most brutal⁴ forces rage in this sea. From the west, cyclones⁵ gather strength as they race across the Pacific. But the reef has found a way of protecting itself. It's called the Great Barrier for a reason. It acts as a wave break, soaking up the power of storms and sheltering the coastline.

 

It's Australia's first line of defense⁶ against the rages of the ocean, protecting not just the reef, but an entire continent. But how does something so fragile survive this onslaught? In fact, it doesn't just survive. Miraculously⁷, it thrives.

 

The waves here act like forest fires, sweeping⁸ through the reef, clearing away old growth. Dead and dying coral is removed, and space is made for new life to take hold. And wave action carries off sand and silt⁹ that could smother¹⁰ the corals.

1 epic   

n.史诗，叙事诗；adj.史诗般的，壮丽的

参考例句：

• I gave up my epic and wrote this little tale instead.我放弃了写叙事诗，而写了这个小故事。
• They held a banquet of epic proportions.他们举行了盛大的宴会。

2 situated   

adj.坐落在...的，处于某种境地的

参考例句：

• The village is situated at the margin of a forest.村子位于森林的边缘。
• She is awkwardly situated.她的处境困难。

3 benign   

adj.善良的，慈祥的；良性的，无危险的

参考例句：

• The benign weather brought North America a bumper crop.温和的气候给北美带来大丰收。
• Martha is a benign old lady.玛莎是个仁慈的老妇人。

4 brutal   

adj.残忍的，野蛮的，不讲理的

参考例句：

• She has to face the brutal reality.她不得不去面对冷酷的现实。
• They're brutal people behind their civilised veneer.他们表面上温文有礼，骨子里却是野蛮残忍。

5 cyclones   

n.气旋( cyclone的名词复数 )；旋风；飓风；暴风

参考例句：

• The pricipal objective in designing cyclones is to create a vortex. 设计旋风除尘器的主要目的在于造成涡旋运动。 来自辞典例句
• Middle-latitude cyclones originate at the popar front. 中纬度地区的气旋发源于极锋。 来自辞典例句

6 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。

7 miraculously   

ad.奇迹般地

参考例句：

• He had been miraculously saved from almost certain death. 他奇迹般地从死亡线上获救。
• A schoolboy miraculously survived a 25 000-volt electric shock. 一名男学生在遭受2.5 万伏的电击后奇迹般地活了下来。

8 sweeping   

adj.范围广大的，一扫无遗的

参考例句：

• The citizens voted for sweeping reforms.公民投票支持全面的改革。
• Can you hear the wind sweeping through the branches?你能听到风掠过树枝的声音吗？

9 silt   

n.淤泥，淤沙，粉砂层，泥沙层；vt.使淤塞；vi.被淤塞

参考例句：

• 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。

10 smother   

vt./vi.使窒息；抑制；闷死；n.浓烟；窒息

参考例句：

• They tried to smother the flames with a damp blanket.他们试图用一条湿毯子去灭火。
• We tried to smother our laughter.我们强忍住笑。