英语听力：自然百科 大堡礁：珊瑚礁到雨林—29

 But there are now less than 2,000 living here, and they are becoming rarer all the time.-Before European settlers arrived, much of the coast here was covered in forest. And a lot of that was jungle just like this. This is a vibrant¹ ecosystem² in its own right. It's full of reptiles³, of birds, and you can hear all around me. But today, things have changed significantly. Much of the coastline that busts⁴ the Great Barrier Reef, 80 percent of it, in fact, has been cleaned for agriculture, and much of that has been totally cleaned for sugarcane. Obviously, this has a dramatic impact on the terracing environment, but it also has a significant effect on the reef itself.

And it's not only crops, cattle ranches⁵, fish farms, six large coastal⁶ cities and many holiday resorts along the coast all have an impact on the reef system. Without the natural vegetation controlling the movement of water in the seidments it carries, heavy rain now washes millions of tons of silt⁷, often laced with damaging fertilizers of pesticides⁸ straight into the lagoon⁹. Sediment¹⁰ pollutants¹¹ can be so extensive, they sometimes spread all the way to the outer reef. In the seagrass meadows, the fine silt thrashes the life-dependent plants and fertilizers feed o* that choke the life from them. When the meadows die, the turtles, dugongs and baby fish that depend on them die too. Near the shore, the water can be so murky¹² that less light reaches the corals, so most fringing reefs have also disappeared.

 

1 vibrant   

adj.震颤的，响亮的，充满活力的，精力充沛的，(色彩)鲜明的

参考例句：

• He always uses vibrant colours in his paintings. 他在画中总是使用鲜明的色彩。
• She gave a vibrant performance in the leading role in the school play.她在学校表演中生气盎然地扮演了主角。

2 ecosystem   

n.生态系统

参考例句：

• This destroyed the ecosystem of the island.这样破坏了岛上的生态系统。
• We all have an interest in maintaining the integrity of the ecosystem.维持生态系统的完整是我们共同的利益。

3 reptiles   

n.爬行动物，爬虫( reptile的名词复数 )

参考例句：

• Snakes and crocodiles are both reptiles. 蛇和鳄鱼都是爬行动物。 来自《简明英汉词典》
• Birds, reptiles and insects come from eggs. 鸟类、爬虫及昆虫是卵生的。 来自《现代汉英综合大词典》

4 busts   

半身雕塑像( bust的名词复数 )； 妇女的胸部； 胸围； 突击搜捕

参考例句：

• Dey bags swells up and busts. 那奶袋快胀破了。
• Marble busts all looked like a cemetery. 大理石的半身象，简直就象是坟山。

5 ranches   

大农场， （兼种果树，养鸡等的）大牧场( ranch的名词复数 )

参考例句：

• They hauled feedlot manure from the ranches to fertilize their fields. 他们从牧场的饲养场拖走肥料去肥田。
• Many abandoned ranches are purchased or leased by other poultrymen. 许多被放弃的牧场会由其他家禽监主收买或租用。

6 coastal   

adj.海岸的，沿海的，沿岸的

参考例句：

• The ocean waves are slowly eating away the coastal rocks.大海的波浪慢慢地侵蚀着岸边的岩石。
• This country will fortify the coastal areas.该国将加强沿海地区的防御。

7 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。

8 pesticides   

n.杀虫剂( pesticide的名词复数 )；除害药物

参考例句：

• vegetables grown without the use of pesticides 未用杀虫剂种植的蔬菜
• There is a lot of concern over the amount of herbicides and pesticides used in farming. 人们对农业上灭草剂和杀虫剂的用量非常担忧。 来自《简明英汉词典》

9 lagoon   

n.泻湖，咸水湖

参考例句：

• The lagoon was pullulated with tropical fish.那个咸水湖聚满了热带鱼。
• This area isolates a restricted lagoon environment.将这一地区隔离起来使形成一个封闭的泻湖环境。

10 sediment   

n.沉淀，沉渣，沉积(物)

参考例句：

• The sediment settled and the water was clear.杂质沉淀后，水变清了。
• Sediment begins to choke the channel's opening.沉积物开始淤塞河道口。

11 pollutants   

污染物质（尤指工业废物）( pollutant的名词复数 )

参考例句：

• Pollutants are constantly being released into the atmosphere. 污染物质正在不断地被排放到大气中去。
• The 1987 Amendments limit 301(g) discharges to a few well-studied nonconventional pollutants. 1987年的修正案把第301条（g）的普通排放限制施加在一些认真研究过的几种非常规污染物上。 来自英汉非文学 - 环境法 - 环境法

12 murky   

adj.黑暗的，朦胧的；adv.阴暗地，混浊地；n.阴暗；昏暗

参考例句：

• She threw it into the river's murky depths.她把它扔进了混浊的河水深处。
• She had a decidedly murky past.她的历史背景令人捉摸不透。