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 before).
…be twice as adj. as …..
…more than xx times as adj. as …..
