The drill takes about three hours to recharge.
钻机充一次电大约要三个小时。
The star varies in brightness by about three magnitudes.
星体的亮度大约分三个星等。
We've been introduced about three times.
我们已经被介绍过三次了。
We drove about three blocks then the motor died.
我们开了大约三个街区，然后发动机坏了。
After about three months, the bananas are ready to be picked.
大约三个月后，香蕉就可以采摘了。
A hair normally grows from each follicle for about three years, is then shed, and a new hair grows.
一根头发通常从每个毛囊中生长约三年，然后脱落，然后一根新头又生长。
He went up from North Denmark to a deserted island of the coast of Norway and stayed there for about three weeks.
他从北丹麦到挪威海岸的一个荒岛上，在那里住了大约三个星期。
It takes about three weeks to a month to notice significant changes in your weight due to altering your training program.
由于改变了训练计划，需要大约三周到一个月的时间才能注意到自己体重的明显变化。
We moved to London about three months ago because Bob got a new job, and we're living in a small flat while we try to find a house.
我们三个月前搬到伦敦，因为鲍勃找到了一份新工作；我们住在一个小公寓里，同时我们也试着找房子。
What is even more interesting is that the brain takes in all the information to create that first impression in about three seconds.
更有趣的是，大脑会在大约三秒钟内吸收所有的信息来创造第一印象。
The cerebellum contains about three million neurons, which also allows you to once again experience the complexity of these systems.
小脑包含大约三百万个神经元，这也能够让你再次体会到这些系统的复杂性。
Consistent with this view, parents and children increasingly engage in discussions of past events when children are about three years old.
与这一观点相一致的是，当孩子大约三岁时，父母和孩子越来越多地参与到对过去事件的讨论中。
Applying the most conservative estimates to current demographic trends, the human population will increase by about three billion people by then.
按照对目前人口趋势的最保守估计，到那时人口将增加约30亿人。
Toni reckoned that it must be about three o'clock.
托尼想一定是3点钟左右了。
The two sides exchanged small arms fire for about three hours.
双方用轻武器交火大约有3 个小时。
About three fifths of them do.
大约五分之三的人这样做。
About three days later, the insects began to fly.
大约三天后，这些昆虫开始飞行。
Dad, about three quarters of our classmates wear glasses.
爸爸，我们班四分之三的同学戴眼镜。
About three weeks later, Jack found Mark had cheated him.
大约三个星期后，杰克发现马克欺骗了他。
About three people are killed each year by great white sharks.
每年大约有3人被大白鲨杀死。
About three hundred people can be checked by it in one minute.
一分钟能检查约300人。
The whale fall in the South China Sea is about three meters long.
中国南海的鲸落深度约为三米。
National Day celebrations for China's seventieth birthday will be held in about three months.
中国70周年国庆庆祝活动将在大约三个月后举行。
It takes about three to six months for a rice plant to become ready.
一株水稻要三到六个月的时间才能成熟。
It's about three meters long, and it took about four years to develop the model.
它大约有三米长，开发这个模型花了大约四年的时间。
Last week she walked up to the store, but when she went to pay for her groceries, she was short about three dollars.
上周她去商店买东西，付款的时候发现缺了大约3美元。
Celebrity Biography, also known as "Three Giants", written by Romain Rolland, about three great men in different fields: Beethoven, Michelangelo and Leo Tolstoy.
《名人传》，又称《巨人三传》，由罗曼·罗兰所写，讲述了不同领域的三个伟人：贝多芬，米开朗基罗和列夫·托尔斯泰。
The regional road was in such bad shape that access to the main towns was impossible for about three months of the year.
当地的道路状况极差，以至于通往主要城镇的道路，在一年中有将近三个月的时间是无法通行的。
According to the Centre for Strategic and International Studies, about three quarters of energy we use to move things, including ourselves, accomplish no useful work.
根据战略与国际研究中心的数据，我们用于移动包括我们自己的物体的能量中，约有四分之三没有完成任何有用的工作。
According to the Center for Strategic and International Studies, about three quarters of the energy we use to move things, including ourselves, accomplishes no useful work.
战略与国际研究中心表示，包括我们自己在内，我们用来移动事物的能量中，约有四分之三的能量没有产生有用功。
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