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   1.描绘

　　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.对比，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.份额，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)

　　本来的2倍-double， 50→100

　　本来的3倍-triple， 50→150

　　本来的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 …..