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.
粗略计算表明，当员工远程办公时，雇主节省下来的费用与员工在家设置办公室所应得的补偿价值相当。
Rough calculations show that the savings made by employers when their staff works from home are of similar value to the compensation workers should receive for setting up offices at home.
粗略计算后可以看出我们无利可图。
粗略计算后可以看出我们无利可图。
A quick computation revealed that we will not make a profit.
为了简化粗略计算，所有个月将是假定有4个星期。
To simplify rough calculations, all months will be assumed to have 4 weeks.
然后在石头上粗略计算，再将最后结果誊写在账簿上。
Then he would scratch his rough calculations on the stone, before transferring the final results on to the pages of the ledger.
显然这只是粗略计算，但是反映了过去惹过麻烦的经济因素。
It is obviously only a crude gauge, but it reflects the economic factors that have caused trouble in the past.
此外，为次要结构，往往是满意的设计上所取得的成果的基础上粗略计算。
Further, for structures of minor importance, it is often satisfactory to design on the basis of results obtained by rough calculation.
粗略计算，辛格作为首相近十年来，几乎十分之一的时间在国外旅行中度过。
Roughly a tenth of his near-decade as prime minister has been spent abroad;
只考虑关键问题粗略计算是一种很有效的领会问题本质的办法，本书就是一个典型例子。
Ballpark calculations are a powerful way of getting to grips with a problem.
不过，据粗略计算，约有一百五十万件文物封在四十七个国家约2 000多个博物馆内。
But based on our rough calculations, about 1.5 million relics are housed in more than 2, 000 museums in 47 countries.
过去对储气罐容积都近似地用圆柱体容积的计算公式来粗略计算，这样很不准确。
The calculation of the volume of gas storage tank was a approximately rough calculation using the calculation formula of cylinder volume in the past, it is not accurate.
通过使用分析可用内存统计信息变化的算法，我们可粗略计算垃圾收集周期之后的可用内存。
We approximate the free memory after a garbage collection cycle by using algorithms that analyze the variance of free memory statistics.
粗略计算的基础上，从当地林业局，大约2,000母猪，经常出现在林业农场在佳木斯。
Based on a rough calculation from local forestry bureau, some 2,000 boars have frequently appeared on the forestry farms in Jiamusi.
这是植物的摩尔定律“，阿特林先生说，这指的是同等价格计算能力每两年增加一倍的粗略计算。”
"This is Moore's law for plants," says Mr Atlin, referring to the rough rule that computing power doubles every two years for the same price.
截至目前，Greenbook买下345，718磅可更新能源积分，粗略计算约合157公吨。
So far, Greenbook has bought 345, 718 pounds in renewable energy credits, or roughly 157 metric tons.
在古时候，人们只在白天工作，从黎明工作到傍晚，如果按十二小时来粗略计算，就是从早上六点工作到下午六点。
In olden times, people worked only during daytime from dawn to dusk, or roughly speaking during the twelve hours from six o 'clock in the morn to six o 'clock in the afternoon.
根据粗略计算，2009年第二季度，中国可能为经通胀调整、折合成年率计算的全球产出增幅贡献了高达两个百分点。
A back-of-the envelope calculation suggests China may have accounted for as much as 2 percentage points of annualised growth in inflation-adjusted world output in the second quarter of 2009.
凯茜作了一个粗略的计算。
这一系列的计算可能仅仅是粗略的估计。
Such linear calculations, of course, can only be very rough approximations.
我粗略地计算了一下过去27年来我们在健身会员卡和健身器械上的花费。
I did a back-of-the-envelope calculation for our spending on gyms and fitness equipment over the past 27 years.
这次粗略的计算取得了成效。
粗略的计算显示，任何有价值的地震预测手段，其观测的地震前兆的准确率必须达到98%以上。
Rough estimates suggest that any useful quake forecast method demands precursors that will prove correct 98 per cent of the time.
云计算(Cloud computing)可以粗略地定义为根据需要使用在用户环境之外以服务形式提供的可伸缩计算资源。
Cloud computing can be loosely defined as using scalable computing resources provided as a service from outside your environment on a pay-per-use basis.
我们的计算只是粗略的。
羽毛/羽绒不穿透性是最重要的质量要求。这可以从面料的结构数据中粗略的计算出来。
The feather and down proofness is the most important quality request. It can be roughly calculated from the construction data of the fabric.
然后得出基本情况，最好情况，最差情况下的净现值，再计算平均净现值和标准偏差，（粗略地）估计该项目的内部固有风险的大小。
Then obtain base-case, best-case, and worst-case NPV and calculate mean NPV and standard deviation to (roughly) estimate the magnitude of the risk inherent to the project.
然后得出基本情况，最好情况，最差情况下的净现值，再计算平均净现值和标准偏差，（粗略地）估计该项目的内部固有风险的大小。
Then obtain base-case, best-case, and worst-case NPV and calculate mean NPV and standard deviation to (roughly) estimate the magnitude of the risk inherent to the project.
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