圣诞老人有大约48个小时来完成这项工作，因此他只有超过0.2毫秒少许的时间在每个住户间疾走。
With roughly 48 hours to do the job, Santa only has a little over 0.2 milliseconds to scamper between households.
多年来他坚持每天工作不超过八个小时，甚至每天都会午睡20分钟。
For many years he has insisted on working no more than eight hours a day and he even has a 20-minute nap on weekdays.
他做了所有的艰苦工作——需要的所有数学——但他没能超过这一界限，你也许会问自己“为什么呢？”吧。
He did all the hard work-all the really necessary mathematics - but he was not able to go beyond that and you will ask yourself, 'Why'?
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