Think about a company like Amazon and the common "Customers who purchased X also purchased y" feature. If Amazon were to create a classification tree, how many branches and nodes could it have?

举个例子，亚马逊这样的公司常常使用“购买了X的顾客还购买了Y ”特性，如果亚马逊拟创建一个分类树，那么它将需要多少分支和节点？

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There are many, but one plausible rule is based on the idea that weight and threshold modification should be determined by a fraction of (t - y).

有很多，不过有一条似乎合理的规则是基于这样一种思想，即权系数和阈值的调整应该由分式(t - y)确定。

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The NCAR Graphics home page provides a stable UNIX package for drawing contours, maps, surfaces, weather maps, x-y plots, and many others.

NCAR Graphics主页提供了一个稳定的UNIX包用来绘制轮廓图、地图、表面图、气象图、x - y图以及很多其他图形。

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Many people hear it and think it is Mary,M-A-R-Y, instead of M-E-R-R-Y.

VOA: special.2009.12.21

As Generation Y enters a difficult job market, many college graduates and young professionals are unwilling to take big financial risks.

FORBES: Financial Insecurity Drives Millennials to Choose Renting

French wildcard Jeremy Chard y produced a second superb display in as many matches to sink 30th seed Dimitri Tursunov 7-6 (7-1) 6-3 6-4.

BBC: SPORT | Tennis | Nadal & Djokovic into round four

The dominant semiconductor giant rode the growing popularity of mobile devices and the ongoing transition to 4G LTE in many parts of the world, to post a 24% growth in revenues y-o-y.

FORBES: Qualcomm Can Dial Up $70 Despite Slower Growth