2.前文
This strange 47 happens every five to eight years.
This告诉我们,此处是重提前面讲到过的某个东西。前面讲到过的核心概念就是El Nino, 无疑是一种天气现象。
表示可从前文找相应线索的有两类。
与this一大类的还有:This/these/such; the same/similar;
worse/better/more/less等。
还有就是表示逻辑关系的句间连词,或者叫连接副词。主要的如下。
递进:Moreover/furthermore/whatmore/besides/in addition/even/also
转折:however/but/rather/instead
因果:therefore/consequently/accordingly/thus/hence
3.后文
El Nino usually lasts for about 18 months. The 1981-83 El Nino
brought the most 52 weather in modern history. Its effect was
worldwide and it left more than 2,000 people dead and caused over
eight billion pounds 53 of damage.
段落开始部分,提出一个总的概括性的说法。往往在下文有分述。El Nino究竟带来的是什么样的天气,后面一句就交代得十分清楚。
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