Dr Balch has done a back-of-the-envelope calculation.

鲍尔奇博士做过一个事后计算。

youdao

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。

youdao

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。

youdao

"Just a back-of-the-envelope calculation shows that in the Philippines, if we in a year can be reaching just five thousand farmers and their fields can be increasing the yield by half a ton per hectare, we could be looking at profitabilities for those farmers in the range of half a million dollars."

VOA: standard.2010.07.28

Hanushek recently did a back-of-the-envelope calculation about what even a rudimentary focus on teacher quality could mean for the United States.

NEWYORKER: Most Likely to Succeed

Extending this forward through our forecast period, a back-of-the-envelope calculation suggests an upside of around 15% to our price estimate for NYT stock.

FORBES: NYT's Online Paywall Has More Ups Than Downs For Stock

Dr Balch has done a back-of-the-envelope calculation.

ECONOMIST: A new experiment is setting the Amazon on fire