Dr Balch has done a back-of-the-envelope calculation.
鲍尔奇博士做过一个事后计算。
I did a back-of-the-envelope calculation for our spending on gyms and fitness equipment over the past 27 years.
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 worked this out with Martin Wattenberg at IBM; it's a back-of-the-envelope calculation, but it's the right order of magnitude, about 100 million hours of thought.
这是我和马丁•瓦滕伯格在IBM计算出来的。这是一个封底计算，但它的数量级是正确的，约1亿小时的思想。
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.
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。
Use the LEADS software to simulate the calculation of beam transfer, and show the envelope curve of beam transfer.
运用LEADS软件，进行了束流传输的模拟计算，并显示了束流传输包络曲线。
The far field spot recorded by plane array CCD will be processed by computer. The obtained spot envelope is consistent with the numerical calculation results.
用面阵CCD记录的远场光斑，经计算机处理后得到的光斑包络与数值计算结果一致。
I make some rough calculation in the back of an envelope.
我在信封的背面做了一个粗略的估算。
A calculation model of accelerator beam envelope has been developed. It can predict beam envelope in linear induction accelerator from the injector to the final focus region.
给出的直线感应加速器束输运的计算模型，能够计算束流从注入器经加速器直到最后聚焦的束包络。
A practical method for formation of envelope surface is introduced in the paper. And a programmed calculation method for manufacturing integral impeller with a four-coordinate NC miller is presented.
介绍一种形成包络面（等距面）的实用方法，提出一种用四坐标数控铣床加工整体叶轮的程序计算方法。
The heat storage of building envelope is not considered by steady state calculation method of heat loss index.
节能标准规定的耗热量指标稳态简易算法没有考虑围护结构的蓄热影响。
The heat storage of building envelope is not considered by steady state calculation method of heat loss index.
节能标准规定的耗热量指标稳态简易算法没有考虑围护结构的蓄热影响。
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