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托福TPO-33 Lecture 2(下)

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OK. Let me explain.

好的,让我来解释。

You probably know that we can determine a tree's age by counting the rings on a cross section of its trunk.

你可能知道我们可以根据计算树干横截面的圈来确定一棵树的年纪。

Each ring represents one year of the tree's life.

每一个圈代表树木生长的一年。

So if you know the year the tree was cut, you can count inwards and date each ring all the way back to the center.

所以如果你知道树木被砍伐的年代,你就能从外向里计算并确定每个圈的年代直到树木的中心。

You can also tell how much moisture the tree got during each of those years by looking at the width of the rings.

你还可以通过年轮的宽度分辨出在每一年里,这棵树受到了多少水分。

A wide ring means plenty of water while a narrow one indicates less.

一条宽的圆圈(年轮)意味着水分充足,而窄的则表示水分不足。

科罗拉多河流域.jpg

Fortunately for us, certain areas of the Colorado River basin are home to some very old trees, some 800 years old and older.

对我们来说幸运的是科罗拉多河流域的某些地方有一些约800年之久甚至更老的古树。

Researchers can drill core samples, uh, basically get a cross section of a tree without having to kill it, look at the rings and get a picture of what the climate was like in the basin for each of the tree's years.

研究人员们可以钻出核心样本,基本上在不杀死树木的情况下得到一个横切面,观察年轮并根据树的每一年了解到流域的气候状况。

Well, the results tell us something we wouldn't have known without this data, that over the past 500 years or so, the Colorado River basin has experienced severe droughts, some worse than any we've ever recorded.

结果告诉我们一些在没有数据的情况下我们无从了解的情况,在过去的500年左右,科罗拉多河流域曾经历了极度的干旱,比我们记录下的严重得多。

They also showed that the early to mid-1900s, when most of the data that led to the water-sharing agreement was collected...well, this was the wettest period in the past 400 years.

它们还说明在20世纪早到中期,为了水资源分享协议而收集多数数据时是过去400年最多雨的时期。

Well, obviously, had water management officials known then what we know now, the 1922 agreement would have been handled differently.

显然,水资源管理官员若是在那时像我们这样了解的话,1922年的协议就会处理得有所不同。

But today we can use the past to help prepare us for the future.

但是今天我们可以用过去帮助我们为未来做准备。

With the demand for water in the basin stays increasing and with the real likelihood of lower flows in the river, if history is our teacher, we can develop innovative methods of water conservation and reevaluate how water is distributed.

随着该流域对水资源需求的增长和该河流存在低流量的可能性,如果历史是我们的老师,那么我们就能建立水源保护的革新性方法并重新评估水资源是如何分配的。

What is the lecture mainly about?

课程的主要内容是什么?

What does the student find surprising about the 1922 water-sharing agreement?

关于1922的水资源共享协议,学生发现什么令人惊讶的事情?

According to the professor, what was the problem with the data recorded before the 1970s?

根据教授所说的,19世纪70年代以前的记录的数据有什么问题?

What assumption did researchers use to draw conclusions about the Colorado River basin?

研究人员用了什么假设给科罗拉多流域下结论?

What does the professor imply when he describes the early to mid-1900s as the wettest period for the Colorado River in 400 years?

教授把19世纪早期到中期这一段时间描述为近400年来科罗拉多河流域最潮湿时期,他这么说的意思是什么?

What is the professor's attitude toward future water-management plans in the Colorado River basin?

对于科罗拉多河流域未来水资源管理计划,教授的态度是什么?

重点单词   查看全部解释    
innovative ['inəuveitiv]

想一想再看

adj. 革新的,创新的

 
determine [di'tə:min]

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v. 决定,决心,确定,测定

联想记忆
reevaluate [,ri:i'væljueit]

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vt. 再评估;重新估计 vi. 再评估;重新估计

 
certain ['sə:tn]

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adj. 确定的,必然的,特定的
pron.

 
trunk [trʌŋk]

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n. 树干,躯干,干线, 象鼻,(汽车后部)行李箱

 
experienced [iks'piəriənst]

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adj. 有经验的

 
assumption [ə'sʌmpʃən]

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n. 假定,设想,担任(职责等), 假装

联想记忆
conservation [.kɔnsə:'veiʃən]

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n. 保存,防止流失,守恒,保护自然资源

联想记忆
imply [im'plai]

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vt. 暗示,意指,含有 ... 的意义

联想记忆
core [kɔ:]

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n. 果心,核心,要点
vt. 挖去果核

 

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