On average doctors write just over seven prescriptions each year per patient; in Germany it is double.
一个医生平均一年仅为每个病人开大约七个处方；而德国是这个数字的两倍。
It enables farmers to harvest 175 pounds of green vegetables per hour.
它使农民每小时能收获175磅绿色蔬菜。
It enables small-scale farmers to harvest 175 pounds of green vegetables per hour.
它使小规模的农户每小时收获175磅的绿色蔬菜。
It flies using a 23 gallon tank of gas and burns 5 gallons per hour in the air.
它使用一个23加仑的油箱飞行，每小时在空中燃烧5加仑。
Likewise, if we look at fluorine in its diatomic molecule, it is 160 kilojoules per mole.
同样的，如果我们观察二价的氟，它是每摩尔160焦。
It can make fine visual distinctions because it is blessed with one million cones per square millimeter in its retina.
它的视网膜上每平方毫米有一百万个视锥细胞，所以它能分辨出很细微的视觉差别。
This control system samples the speed of each wheel on a vehicle and controls each brake's pressure (to stop it from locking up) at up to 20 times per second.
该控制系统对车辆上每个轮子的速度进行采样，并以每秒20次的速度控制每个刹车的压力（防止它锁死）。
Coal output per miner in Tribnia is double what it was five years ago, even though no new mines have opened.
尽管没有新煤矿投产，但Tribnia每个矿工的煤炭产量是五年前的两倍。
One online course provider I use asks you what you think of the course after you've only completed roughly 2 per cent of it.
我上过的一门在线课程在上完大概2%的时候，就开始询问我对这门在线课程的评价。
In fact, 24 per cent of our galaxy elemental mass consists of helium, which makes it the second most abundant element in our universe.
事实上，银河系中24%的元素质量是由氦组成的，这使它成为宇宙中第二丰富的元素。
These results suggest that if a business wants to prosper, it should hire only people who need less than 6 hours of sleep per night.
这些结果表明，如果一个企业想要成功，它应该只雇佣每晚睡眠时间少于6小时的人。
It is often stated that we use only 10 per cent of our brain.
常有报告称人只运用了大脑的10%。
By 2020, it will be top, with predictions of 130 million visitors per year.
到2020年，它将成为世界第一，预计每年将接待1.3亿游客。
With half an inch of rain per year, the beetle can only survive by consuming the dew it collects on the hydrophilic skin of its back in the early mornings.
在每年只有半英尺降雨量的环境下，这种甲虫只能通过它背部亲水性皮肤在早晨收集的水露存活下来。
It reproduces incredibly quickly, breeding up to 12 generations per year if conditions are favorable.
它的繁殖速度快得令人难以置信，在条件适宜时，一年可繁殖12代。
The school administration has decided to make it mandatory for each student to volunteer at least 40 hours per year.
学校管理部门已经决定强制要求每个学生每年至少志愿服务40个小时。
The school administration has decided to make it mandatory for each student to volunteer at least 40 hours per year to one of the town's many volunteer programs.
学校管理部门已经决定强制要求每个学生每年参加该镇众多志愿者项目的其中一个，志愿工作时长至少要达到40个小时。
Labor productivity grew by only one percent in 1997, real GDP per capita grew more slowly in 1997 than it had on average between 1873 and 1973.
劳动生产率在1997年仅增长了1%，1997年实际人均国内生产总值的增长速度比1873年至1973年之间的平均水平要慢。
In 2005, as the authors observe, real consumption per person in France was only 60% as high as the U.S., making it appear that Americans were economically much better off than the French on average.
在2005年，正如作者所观察到的，法国的人均实际消费仅为美国的60%，表面上美国人的平均经济状况似乎比法国人好得多。
The country produces only about 60 per cent of the food it eats, down from almost three quarters in the late 1980s.
该国的粮食产量仅占其所食粮食的60%左右，比1980年代末的近四分之三有所下降。
It grows very slowly, nearly 15mm per year.
它的生长速度得非常缓慢，每年生长约15毫米。
It flies at 240 km per hour at a height of 4,500 meters in the sky.
它在4500米的高空以每小时240公里的速度飞行。
It can fly at a speed of about 200 miles per hour.
它能以每小时200英里的速度飞行。
Before it, in the 1950s and 1960s, more than fifty thousand whales per year were killed.
在此之前，在20世纪50年代和60年代，每年都有超过5万头鲸鱼被捕杀。
It flies as high as 3000 meters, and as fast as 100 kilometers per hour.
它的飞行高度可达3000米，速度可达每小时100公里。
It will surely make people healthy to stay away from junk food and try to eat more kinds of food per day.
远离垃圾食品，每天尽量吃更多种类的食物，一定会使人们健康。
With only one observation per country, it is impossible to control for unobserved heterogeneity across countries.
由于每个国家只有一个观测结果，因此不可能控制各国间未观察到的异质性。
Despite moving at 18 miles per second, it still takes the Earth a year to make it around the Sun.
不管地球的运行速度只有每秒钟18英里，它还是一年又一年地围绕着太阳运转。
Despite moving at 18 miles per second, it still takes the Earth a year to make it around the Sun.
不管地球的运行速度只有每秒钟18英里，它还是一年又一年地围绕着太阳运转。
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