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3、倍数的表达方式

Double 是两倍/大一倍

Increase/decrease three times 增长/减少了三倍

4、大约的表达方式

About/around + 数字

数字 + or so

Approximately + 数字

5、常用的小作文的趋势句式表达

句式一： 变化主体/图画中主体+趋势动词+副词+时间区间

Eg: The number of aged people over 65 increased significantly from 1940-2000.

The number of aged people over 65 dropped slightly from 1960-1980.

The number of aged people over 65 fluctuated between 1 million and 1.2 million from 1940-1950.

The number of aged people over 65 remained stable from 1930-1940.

句式二： There be + 形容词 + 表示趋势的名词 + in+ 变化的主体+ 时间区间

Eg: There was an significant increase in the number of aged people over 65 from 1940-2000.

There was a slight decline in the number of aged people over 65 from 1960-1980.

There was a fluctuation between 1 million and 1.2 million from 1940-1950.

延伸阅读：

作文中避免使用一些过于简单的词汇

雅思阅读的5个坏习惯要丢掉

雅思阅读语法部分如何提高

更多阅读资料：
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