玛雅故土的降雨量在不同年份是变化莫测的;最近几年的降雨量比其他年份多三到四倍。
Rainfall in the Maya homeland is unpredictably variable between years; some recent years have had three or four times more rain than other years.
不同项目有不同的准则,它们在种类和复杂程度上的变化比多数非技术人员所意识到的要多很多。
Different kinds of projects have different criteria, and they vary in type and complexity more than most nontechnical people realize.
即使IT的层叠不会改变那么多,客户感知到得不同层面的价值也会变化,IT公司靠不同层面来赚钱,利润也会相应变化。
Even though the it stack may not change all that much, the perceived value of the different layers will shift, and with it the amount of profit it firms can make from each of them.
Now there's a lot of variation in that: men would be different from women, taller more then shorter, all that sort of thing, but nonetheless let's just use that as a reference.
当然随情况会有不同变化,男人需要的比女人多,高的比矮的多,像这类情况,但我们用这数据做个参考
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