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 by C . 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 are p% q% and r% ，respectively., The regions can be divided into two groups-one where … and the other where the reverse is the case.
2.比较，占据，百分数, Form， comprise， make up， occupy, In 1950， the urban population represented less than 13% of the total. It is now 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)