finds roughly one defect per ten minutes of reviewing – as long as they review
pick the best choice for each subtree, and compute the cost of any
，更多细节参见有道翻译
With EC2 instances you generally know what you are getting (instance type corresponds to specific CPU), although there's a multitude of ways to pay/reserve/prepay/etc which makes pricing very complicated, and pricing further varies by region (I used the lowest cost US regions). In the 1Y/3Y reserved prices listed, there is no prepayment included - you can lower them a bit further if you do prepay. The spot prices vary even more, both by region and are updated often (especially for newly introduced types), so you'd want to keep track of them.
Глеб Палехов (руководитель сектора БСССР)