ukiset阅读：海洋的最后时刻

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That the seas are being over-fished has been known for years. What researchers such as Ransom Myers and Boris Worm have shown is just how fast things are changing. They have looked at half a century of data from fisheries around the world. Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time.

第一，划分句式结构：

这个段落选自文章的第二段的前半部分，但是该段落中的句子难度并不大，考生可以看到首句为that引导的主语从句，然后就可以看到后面由what引导的主语从句，同时，该句中还包含一个表语从句“ how fast things are changing”；后面的句子中包含由they作为人称代词的指代，这也就意味着与前面的关系非常重要；最后的这个句子中包含了not ... but 结构，这个也是需要引起考生注意的（不是...而是...）；

第二，了解句子大概意思：

人们知道海洋被过度捕捞这个事实已经很多年了。迈尔斯博士和沃尔姆博士这样的研究人员所展示的情况说明了变化有多快。他们研究了全世界渔场半个世纪的数据。他们的方法不是试图确切估计在具体某地方的海洋中鱼类的量，而是估计该地区生物量随着时间推移的变化。

第三，句式挖空：

That   is being adj. has been known for years. What researchers such as Ransom Myers and Boris Worm have shown is just how fast    are changing. Their   do not attempt to estimate     in particular parts of   , but rather changes in that  over time.

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