在英文中，除了用than和as来对两个事物进行比较外，我们还可以用times和twice等词来说明两事物之间的倍数关系。
在英文中，表示两事物倍数关系的比较，我们可以用以下三种句型
A is three times bigger(或其他形容词的比较级)than B
▋when the united states entered just such a glowing period after the end of the second World war,
it had a market eight times larger than any competitor,giving its industries unparalled economies of scale.
妙语点拨：「这里是“倍数+比较级”结构」
★译文：美国在二战后进入这样辉煌的历史时期时，它拥有比任何竞争对手大八倍的市场，这使其工业经济规模无可匹敌。
As is three time as big(或其他形容词的原级)than B
▋there are about 105 males born for every 100 females,but this ratio drops to near balance at the age of maturity,
and among 70-year-olds there are twice as many woman as men.
妙语点拨：「这里是“倍数+as...as”结构」
★译文：每出生100名女婴，就会有105名男婴出生，但这个比例在他们成年是下降为基本平衡，在70岁的老人中女性是男性的两倍。
A is three times the size（或其他形容词对应的名词形式）of B
▋According to Canadian Institute for Health information,
prescription drugs costs have risen since 1997at twice the rate ofoverall health-care spending.
妙语点拨：「这里是“倍数+名词”结构」
★译文：加拿大医疗信息协会的资料表明，自1997年以来，处方药费用的增长速度是整个医疗费用增长速度的两倍。
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