阅读部分需要提取的观点是：
- Main point: 专家提出三种方法来解决香榧树数量减少、濒于灭绝的问题
- Sub point 1: 在原地种植香榧树
- Sub point 2: 把香榧移到比原生地往北的地方
- Sub point 3: 把香榧移到研究中心
听力材料：
You’ve just read about three ways to save Torreya Taxifolia. Unfortunately, none of these three options provides a satisfactory solution.
你梦刚刚听到了三种保护佛罗里达香榧树的方法。很遗憾，这三个方法都不能解决这个问题。
About the first solution – reestablishing Torreya in the same location – that’s unlikely to be successful, because of what’s happening to the coolest dampest areas within Torreya’s micro-climate. These areas are being strongly affected by changes in the climate of the larger region. This could be because global warming has contributed to an increase in overall temperatures in the region or because wetlands throughout Florida have been drained. Either way, many areas across the region are becoming dries, so it’s unlikely that Torrey would have the conditions it needs to survive anywhere within its original Florida micro-climate.
先说第一个方法。在原地种植香榧树是不可行的。这是因为原来适合香榧生长的湿冷微气候已经发生了变化。这些地方的微气候受到了整个大区域气候变化的严重影响。这可能是因为全球变暖导致了该地区整体温度的上升，也可能是因为整个佛罗里达地区的湿地变干。无论是那种原因，该区域的很多地方都变得很干旱，同原来香榧树生长的佛罗里达微气候已经不同。
Now about the second solution, relocating Torreya far from where it currently grows. Well, let’s look at what happened when humans helped another tree, the black locust tree, move north to a new environment. When they did this, some of these plants and trees were themselves already in danger of becoming extinct.
现在说一下第二个方法，就是把香榧种在远离它们原来生长地的区域。恩，让我们看看人类帮助另一种树的。人们把洋槐树向北移，移到了一个全新的环境。这么做了之后，当地一些本来已经濒危的植物或者树木因而灭绝了。
Third, research centers are probably not a solution either. That’s because the population of Torreya trees that can be kept in the centers will probably not be able to resist diseases. For a population of trees to survive a disease, it needs to be relatively large and it needs to be genetically diverse. Tree populations in the wild usually satisfy those criteria, but research centers would simply not have enough capacity to keep a large and diverse population of Torreya trees. So, trees in such centers will not be capable of surviving diseases in the long term.
第三，移到研究中心也不是一个有效的方法。这是因为研究中心能够保护的香榧的数量不足以帮助香榧抵御病虫害。如果一种树木想要抵御病虫害，就需要它的数量达到一定规模，并且具有基因多样性。在野外生长的树木一般可以满足这些要求，但是研究中心没有能力保护数量足够多，基因足够多样化的香榧树。所以，长期看来，这样的研究中心是不能保证香榧树抵抗病虫害的。
听力部分需要提取的观点是：
- Main point: 三种方法都不能解决问题
- Sub point 1: 原有气候已经不适合香榧生长
- Sub point 2: 往北迁移可能会因生态入侵造成其他物种灭绝
- Sub point 3: 研究中心承载能力有限，不能确保香榧能抵抗病虫害。
