1.描述

It is clear that the most (adj.) xx is A， which accounts for m% of all x .B is the next largest(adj.)xx ，n% lower than A of all x and followed closely byC . The above three items of xx take uo about o% of the x%

By contrast D E andF make uo the smallest percentage of total x ， which arep% q% and r% ，respectively.

The regions can be divided into two groups-one where … and the other wherethe reverse is the case.

2.比较，占据，百分数

Form， comprise， make up， occupy

Constitute， cover， represent， account for

Be shared by

In 1950， the urban population represented less than 13% of the total. It isnow about 40% and is expected to reach 60% by 2030. (摘自BBC)

3.比例，倍数

A quarter of…

Half of…

A majority of…

A has something in common with b

A shares some similarity with b

The difference between a and b lies in…

Double， triple， quadruple (v， n， adj)

原来的2倍-double， 50→100

原来的3倍-triple， 50→150

原来的4倍-quadruple， 50→200

The value of the house has increased fourfold (=it is now worth four timesas much as bore).

…be twice as adj. as …..

…more than xx times as adj. as …..

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