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Section 4
第四部分
You'll hear a lecture about Great Barrier Reef. First you have some time to look at the questions 31-33.
你將會聽到一個關(guān)于大堡礁的講座。在播放錄音之前，你有一些時間閱讀問題31-33。
Now listen carefully and answer questions 31-33.
現(xiàn)在請仔細聽錄音并回答問題31-33。
Despite of its name, the Great Barrier Reef isn't just one large coral reef.
雖然被稱做大堡礁，但它可不僅僅只是一個大珊瑚礁。
Rather, it's a system of coral reef that stretches along the east coast of Australia, covering an area of around 300,000 square kilometers.
更確切地說，它是一個綿延整個澳大利亞東海岸的珊瑚礁生態(tài)系統(tǒng)，總面積約300,000平方公里。
The Great Barrier Reef is composed of approximately 3000 individual reefs which range in size from one hectare to more than 10,000 hectares each.
大堡礁由近3000個獨立的珊瑚礁組成，這些珊瑚礁的單個規(guī)模從1公頃到10,000公頃不等。
In addition, around 600 islands are scattered throughout the area, particularly at the northern and southernends.
另外，該區(qū)域還分布著大約600座島嶼，其中大堡礁南北兩端分布的島嶼數(shù)量尤其多。
The reefs themselves are composed of over 400 different kinds of coral, the largest variety of coral found anywhere in the world.
這些珊瑚礁本身是由超過400種不同的珊瑚構(gòu)成的，是目前世界上發(fā)現(xiàn)的珊瑚種類最多的地方。
Now, listen carefully and answer questions 34-40.
現(xiàn)在請仔細聽錄音并回答問題34-40。
Thousands of species of sea animals live in and around the reefs.
成千上萬種海洋生物生活在珊瑚礁里面或者周圍。
Altogether, approximately 1500 species of fish inhabit the reef area, including a number of different kinds of sharks.
總共有大約1500種魚類居住在大堡礁區(qū)域內(nèi)，其中包括很多不同種類的鯊魚。
One of the more interesting mollusks to be found in the reefs is the giant clam.
在珊瑚礁內(nèi)能找到的有趣的軟體動物之一就是巨型蛤蚌。
These huge shelf fish can live for more than a hundred years and can weigh as much as 200 kilos.
這些巨型的貝類可以活到一百年以上，體重最多可達200千克。
Sea mammals are bound in the area, which serves as a breeding ground for certain types of whales, many of which are endangered.
該區(qū)域內(nèi)還有很多海洋哺乳動物。大堡礁是某些品種的鯨魚的繁殖地，而這些鯨魚中很多正瀕臨滅絕。
Over two hundred species of sea and shore birds feed, roost on nest among the reefs and islands.
超過兩百種海鳥和濱鳥在這些珊瑚礁和海島上捕食、棲息或者筑巢。
Many types of reptiles can also be found living around and near the reefs.
人們發(fā)現(xiàn)很多種爬行動物也生活在珊瑚礁中或者附近。
Salt water crocodiles, for example, inhabit the marshes along coast or the area.
比如，灣鱷就居住在大堡礁沿岸或區(qū)域內(nèi)的沼澤地里。
Amphibians include at least 7 species of fogs inhabit in the islands and reefs.
包含至少七種蛙類在內(nèi)的很多兩棲動物都生活在大堡礁的海島上。
Unfortunately, this wondrous area of the world is threatened by climate change.
不幸的是，氣候變化正威脅著這一世界奇境。
Rising sea temperatures have led to an effect called "coral bleaching",
不斷上升的海水溫度導(dǎo)致了一種被稱為“珊瑚白化”的現(xiàn)象，
that is large numbers of corals dying off,especially in the shallower area of the reef.
即大量的珊瑚相繼死去，尤其是大堡礁淺水區(qū)域的珊瑚。
The Great Barrier Reef Marine Park Authority is attempting to find effective ways to deal with this issue that threatens the reef.
大堡礁海洋公園正在努力尋找能夠有效處理這一問題的方法，因為這一現(xiàn)象威脅著大堡礁的存亡。
One proposed solution involves shading the reef in certain areas to help keep the surrounding water temperatures down.
有人提出的一個解決方法是把大堡礁特定區(qū)域的陽光遮住，以幫助降低周圍海水的溫度。
That is the end of section 4. You now have half a minute to check your answers.
以上是第四部分的全部內(nèi)容，現(xiàn)在你有30秒的時間檢查答案。
