地球的力量

You know, this is such a beautiful, idyllic spot.
这里是很美丽的田园之地
It's hard to believe that an ecological catastrophe happened here.
很难相信这里曾经发生过生态灾难
But in 1998, sea temperatures
但是在1998年，该地区海洋温度

throughout the region increased by almost two degrees.
升高了将近2度
For these jellyfish, it was a disaster.
对于这些水母来说是灾难
It's estimated up to 20 million of them perished.
据估计有2000万死亡
Just two degrees of warming
只是2度
was enough to almost annihilate an entire species.
就几乎消灭了整个物种
Fortunately, this was caused by a short-lived
幸运的是，这是由于当地温度
variation in the local climate.
发生短暂变化造成的
Once the waters began to cool, the jellyfish were able to recover.
一旦海水降温，水母就会恢复
But it's a stark warning of what could happen
但是这是个残酷的警告
if the world's oceans become too warm.
如果世界的海洋因为气候变化继续变暖后果将会是什么
The seas around Palau are also vulnerable
但是帕老地球的海洋
to another threat related to carbon dioxide.
很容易遭受另一个于二氧化碳有关的威胁
And it's potentially far more serious than increasing temperatures.
可能要比温度升高更严重
It's called ocean acidification.
那就是海洋酸化
It happens when carbon dioxide in the atmosphere
当大气中的二氧化碳
dissolves into the sea.
溶解到海洋中就会发生这种情况
In the past, levels of carbon dioxide changed very slowly.
在过去，二氧化碳的含量变化很慢
So the oceans had time to adjust to any increase in acidity.
所以海洋有时间适应酸度的增长

重点讲解

1、estimate
估算;估价
Try to estimate how many steps it will take to get to a close object.
尽力估算一下达到一个近距离目标需要多少步。
I estimate that the total cost for treatment will be $12,500.
我估计治疗费用总共会有12,500美元。
估算;估价
the official estimate of the election result.
竞选结果的官方预测
This figure is five times the original estimate.
这个数据是最初估算的5倍。
估算单;预算书
The shop also offers a curtain-making and fitting service. Quotes and estimates can be prepared by computer on the spot.
那家商店还提供窗帘制作和安装服务，而且可以用计算机现场制作报价单和预算书。
2、potential
潜在的；可能的
The firm has identified 60 potential customers at home and abroad.
该公司已在国内外找到60个潜在客户。
potential party members.
有可能发展成党员的人
潜力；潜质
The boy has great potential.
这个男孩非常有潜质。
The school strives to treat pupils as individuals and to help each one to achieve their full potential.
学校力求对每一个学生因材施教，帮助他们充分发挥其潜力。
可能性；潜在性
John seemed as horrified as I about his potential for violence.
约翰似乎和我一样害怕他自己会使用暴力。
The meeting has the potential to be a watershed event.
这次会议有可能成为具有转折性的事件。