这要花大约三周时间，出入不过一天左右。
这种想法出现于公元1800年左右，当时人口变得足够多，大约有10亿人，人类的活动开始能够改变环境。
The idea is that around the year 1800 CE the human population became large enough, around a billion people, that its activities started altering the environment.
在大约15岁左右的时候，由于学校、工作和其他活动的压力，这些男性自愿开始减少夜间睡眠时间。
At about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities.
但在大约15岁左右的时候，由于学校、工作和其他活动的压力，这些男性自愿开始减少夜间睡眠时间。
But at about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities.
我估计她的年纪大约是五十岁左右。
在车站附近有大约一百家左右的旅馆。
There were a hundred or so hotels in the vicinity of the station.
然而有一天，大约在下午三点左右，他捡到一块鹅卵石，它是温暖的。
One day, however, about midafternoon, he picked up a pebble and it was warm.
“噢，我有姑娘们干，”托德轻松地说，“大约二十个左右，常年在干活。”
"O, I have girls," said Toad lightly: "twenty girls or thereabouts, always at work."
据说大约一年后，价格会降到2000元左右。
It is said that about one year from now, the price could go down to around 2,000 yuan.
没有人知道确切的数字，但是根据政府的调查，粗略计算之后显示，大约有1600所美国公立和私立学校在教授中文，而十年前只有300所左右。
No one keeps an exact count, but rough calculations based on the government's survey suggest that perhaps 1,600 American public and private schools are teaching Chinese, up from 300 or so a decade ago.
美国华盛顿大学的心理学教授安德鲁·梅尔索夫发现，大约1岁左右的婴儿即开始通过凝视别人来推断他们都在想些什么。
Andrew Meltzoff, a professor of psychology at the University of Washington, found infants at about age 1 begin to infer what others are thinking by following the gazes of others.
这样，大约在2030年左右就会出现一个断层。
That, however, leaves something of a disconnect around 2030.
每周文件平均不是很大—只有大约100KB左右。
An average weekly file isn't terribly big - only about 100kb or so.
每天，有大约150个左右的T恤设计从世界各地提交到他们的网站上。
Every day, about 150 T-shirt designs from all corners of the world are submitted to their website.
上图中的亚克力刀架大约70美元左右。
事实上，全球的空气中的含氧量大约在21%左右，与维多利亚时代，罗马时代和穴居人时代差不多。
In fact, the oxygen content of the air worldwide is about 21 per cent, the same as it was for the Victorians, the Romans and the Neanderthals.
电池的电量大约是350张左右，或者更多一些。
Battery life is about 350 shots a charge, which could be better.
凌晨，大约3点40左右，一个人突然闯了进来，直奔我床的方向。
At about 3.40 in the morning, someone burst into my room and started running toward the bed.
这次西南都柏林支持者大约60%左右。
Voters in Dublin South West backed the treaty this time by around 60%.
在撰写本文时它仍是免费的beta版，但它正式发行的版本售价大约在 $150 左右。
It is still in free betas as of this writing, but the release version is expected to cost around $150.
根据这些结果，可以准确地估算出这个StringBuffer实现大约在1.5左右。
Based on the results, an accurate estimate for this particular StringBuffer implementation is somewhere around 1.5.
我对邻居说：“我不算胖，但是我想减点体重—大约10磅左右吧。”
I'm not fat," I told my neighbor, "but I would like to lose a little—about ten pounds."
他和妻子在旅游时顺道拜访了我，大约五分钟左右。
He stopped by with his wife for about five minutes during the trip.
受到需求减弱的影响，IT业工资的平均上涨率已经减半，目前大约每年上涨10%左右。
Partly because of falling demand, the average rise in IT wages has halved, to around 10% a year.
然而对于这次系列恐怖袭击事件造成死100多人伤大约250人左右这一确切情况，周三晚的华盛顿并不清楚。
But the exact circumstances of the series of attacks, which killed over 100 people and injured some 250, were unclear on Wednesday evening in Washington.
如果看了迈克的照片，特别是这张他接受手术前的照片，就在他接受手术的时候，即他大约30岁左右时，他还在从事高山滑雪。
If you see the pictures of Mike, especially here well before he had his surgery at the time he was about 30 skiing downhill.
大约39%左右的制造商表示，如果日元兑美元停留在85点上下的水平的话，他们会将工厂和研发中心转移到海外去。这是日本贸易部上周对200家公司调查的结果。
Some 39 percent of manufacturers said they will move factories and development centers overseas should the yen stay at about 85 per dollar, a Trade Ministry survey of 200 companies showed last week.
大约39%左右的制造商表示，如果日元兑美元停留在85点上下的水平的话，他们会将工厂和研发中心转移到海外去。这是日本贸易部上周对200家公司调查的结果。
Some 39 percent of manufacturers said they will move factories and development centers overseas should the yen stay at about 85 per dollar, a Trade Ministry survey of 200 companies showed last week.
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