托福聽力lecture并列型分析

在攻克時(shí)，想必同學(xué)們遇到了不少麻煩，為了幫助大家學(xué)習(xí)，在中獲得更高的分?jǐn)?shù)，之前為大家介紹了lecture的并列型結(jié)構(gòu)，一般是圍繞某一個(gè)主題并列平行展開去講解。這類結(jié)構(gòu)沒有之前我們見到的直線型結(jié)構(gòu)那么好區(qū)分，因?yàn)樗麤]有明顯的表示時(shí)間地點(diǎn)人物的信號詞，但是這種結(jié)構(gòu)類型是我們TPO和考試中出現(xiàn)的比較多的結(jié)構(gòu)類型。這次分析一篇按并列結(jié)構(gòu)分層的一篇文章。

今天我們以TPO27-L1為例，給大家講解一下。

So we have been fairly thorough in our discussion about coral reefs, which of course are prominent, oceanic features made of hard limestone skeletons produced by tiny coral animals. We’ve gone over where coral reefs are usually formed – along the edges of shallow ocean banks in tropical or subtropical regions, and the fact that they are declining at an alarming rate. But I don’t want to leave you with the impression that all is lost. There are several techniques being employed today that could prove useful in assuring the future of the reefs.

文章的開始給了我們明確的線索，coral reef在受到侵害，我們要想出一些方法去保證珊瑚礁的未來，所以文章的后面一定會(huì)列舉這些方法。

Now, we’ve talked in depth about coral bleaching, or whitening, which as you recall, is a symptom of …well that the coral is suffering. As you know, coral is very sensitive to water temperature，Even though one or two degree Celsius rise in sea surface temperature for a relatively short amount of time can cause bleaching. Recently, researchers have used data collected by monitoring surface water temperatures to improve the ability of a reef to recover from bleaching. One future possibility is that improved monitoring can help predict where and when bleaching will occur, which might potentially enable us to mitigate its effects. 首先第一種方式就是用檢測溫度的方式去緩解對于珊瑚礁的傷害

And there’s another technique that’s been experimented with to try to help coral reefs recover from bleaching. It’s called coral transplantation. This involves moving young coral from a healthy reef onto a degraded reef, you know, in an attempt to regenerate the degraded reef by encouraging young healthy coral to take over. There has been some success with this, but it’s still somewhat controversial. Some scientists support it because, well for one thing, it means you don’t have to rely on the existing coral to reestablish itself because it might not be able to. But in my opinion, transplanting coral should only be used as … well as a last resort. I mean, this method is not only costly but it’s … well even if it’s successful, it still fails to address the ongoing problem, the root causes of the degradation, which really is paramount to devising an effective solution. So I don’t really take comfort in the successes they have had with transplantation. 后面的信號詞非常明顯，另一種方式就是coral transplantation并且老師對于這種方式明顯表示出了否定的態(tài)度，我們也說過，但凡出現(xiàn)態(tài)度的信息一定會(huì)有題目的考察。

Perhaps some more constructive use of our time could be spent at researching corals that do survive, like in areas known as refugia. Refugia are areas on the reef that are seemingly, well resistant to bleaching. See, when coral reefs experience bleaching, it’s rarely a case of the whole reef being affected. There are almost always pockets of coral on the reefs that remain unaffected. And these are often the lower areas of the reef, those located in deeper water, where temperatures are lower.另外一點(diǎn)more constructive的方式是輕盈研究Refugia。Refugia是屏幕提示的信息，也是屬于非常典型的考點(diǎn)，我們只需要去聽這個(gè)學(xué)科詞的直接解釋就可以了。Refugia are areas on the reef that are seemingly, well resistant to bleaching

Now, we have evidence that corals in these locations are able to escape the destructive bleaching that affects portions of the reef in shallower or warmer water. So in my mind, it’s these refugia that are the key components of overall reef resilience. These should be the area of concentration for researchers to locate and protect those regions as a way to sustain coral reefs.

And we can also protect the reefs by protecting the surrounding ecosystems, like mangrove forests and seagrass beds. Both of these grow in coastal waters, often in the vicinity of coral reefs. By protecting these areas, we also protect the coral. Let’s take, for example, the mangrove forests. Mangrove root systems have the ability to absorb and well trap sediments and pollutants in water that flows through them before they enter the ocean. This of course has beneficial results for the nearby coral reefs. 最后我們還可以通過保護(hù)周邊的生態(tài)環(huán)境去保護(hù)珊瑚礁，首先可以通過Mangrove

And fishery’s management is another key strategy. Overfishing can be seriously disruptive to coral. Let me give you a couple of examples. Overfishing certain species of fish and shellfish like snappers, barracudas and even lobsters. Well all of these creatures feed on snails, worms and other organisms that eat coral. So depleting the number of lobsters, for example, means that we are adding to the threat of coral decline. Sea urchins are another example. They eat algae and prevent it from overwhelming the coral. Since the disappearance of sea urchins from the waters up the coast of South Florida, many coral reefs there have been smothered by the uncontrolled growth of algae. 另外可以通過限制fishing來達(dá)到我們的目的。

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