我们今年的产量是2002年的四倍。
This year we produced quadruple the amount produced in 2002.
大米、鸡蛋、卷心菜等主食的价格在一些地区翻了一番甚至四倍。
The price of staple foods such as rice, eggs, cabbages have doubled and even quadrupled in some areas.
过去几年中销售量较原来的增加了四倍。
过去五年中，销售额已增长至以前的四倍。
这座城市的空气污染程度曾高达可接受标准的四倍。
Air pollution in the city had reached four times the acceptable levels.
她的研究表明，人在跑步时，脚每次着地对地面的压力相当于自身体重的四倍，而竞走者不完全离开地面，其每步的压力只有自身体重的1.4倍。
According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.
在本世纪末，实现工农业总产值增四倍的目标是完全可能的。
It is entirely possible to achieve the goal of quadrupling the gross annual value of industrial and agricultural production by the end of the century.
事实证明，生活在溪边栖息地的鸟对数量是远离溪边栖息地的四倍。
It turned out that there were actually four times as many bird pairs or couples living in the stream edge habitat compared to the area away from the stream.
研究发现，城市树木的碳循环速度和生长速度几乎是乡村树木的四倍。
It was discovered that rates of carbon cycling and growth rates among city trees were nearly four times faster than those in the countryside.
相反，刚从大学毕业的化学工程师的工资几乎是入门级高中毕业生的四倍。
Conversely, chemical engineers straight out of school can easily make almost four times the wages of an entry-level high-school graduate.
超市的商品种类比以往任何时候都多，并且美国农贸市场的数量是二十年前的四倍多。
Supermarkets offer more variety than ever, and there are over four times as many farmers' markets in the U.S. as there were 20 years ago.
玛雅故土的降雨量在不同年份是变化莫测的；最近几年的降雨量比其他年份多三到四倍。
Rainfall in the Maya homeland is unpredictably variable between years; some recent years have had three or four times more rain than other years.
那些在研究开始后一个月内就开始吸烟的人在研究结束时抑郁的可能性是那些没有开始吸烟的人的四倍。
Those who began smoking within a month of the study's start were four times as likely to be depressed at the study's end than those who did not begin smoking.
四倍体是指在细胞顶部包含4组染色体的细胞。
Tetraploidy means cells containing 4 sets of chromosomes atop.
四倍减小，周期肯定是，减小2倍。
危地马拉的肥胖人口比例在30年间翻了四倍。
过去25年，美国人的普遍肥胖已经增加了四倍。
The prevalence of obesity among American boys and girls has quadrupled over the past 25 years.
商业用电量在最高峰时是最低点是的四倍。
Commercial usage is as much as three times higher at its peak than at its nadir.
然而，月球地壳几乎是地球地壳厚度的四倍。
However, the crust is almost four times thicker than the earth's crust.
若无补助，太阳能的成本是煤碳电能的四倍。
Without subsidies, solar is about four times more expensive than energy from the coal-powered grid.
那是风能平准化成本的两倍，燃煤发电的四倍。
That’s more than double EIA’s estimate of the total system levelized cost of wind, and almost four times the cost of conventional coal.
但是当巧匠们接手之后，蒸汽机的效率一下子变成了四倍。
But when the tweakers took over the efficiency of the steam engine swiftly quadrupled.
自一月份以来，对美国(国债？)违约投保成本已飙升四倍。
The cost of insuring against a default by the United States has quadrupled since January.
目前在乌干达进行的一项试验表明，覆盖率已由两倍增至四倍。
An ongoing trial in Uganda shows that coverage rates have increased by from two-fold to four-fold.
迄今为止，我已经花费了四倍多的钱和数不尽的时间。
To date, I've spent more than four times that amount and countless hours of my time.
灯管中充上水银蒸汽的荧光灯比它的功效高大约四倍。
Fluorescent lights, which consist of tubes filled with mercury vapour, are roughly four times more efficient.
自闭症的发病率男孩较高，是女孩的四倍，原因不明。
For unknown reasons, autism is four times more likely to occur in boys than in girls.
他们凿建了三条巨大的运河，使得城市面积扩大了四倍。
They build these three large canals and this expands the area of the city by four times.
2040年，美国的人均收入依旧会是中国的三到四倍。
In 2040 the average American will still be three to four times richer than the average Chinese.
2040年，美国的人均收入依旧会是中国的三到四倍。
In 2040 the average American will still be three to four times richer than the average Chinese.
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