When a grouping key is specified, the data must be grouped by this key before the aggregation can be computed, as illustrated in figure 13.

指定了分组关键词后，必须在完成聚合计算之前，依据这一关键词对数据进行分组，如图 13 所示。

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Japan is especially reluctant to do so, as was illustrated by a recent spat over American beef, in which fears of mad-cow disease strengthened the hands of protectionists.

尤其是日本更无此意。有例为证，最近日本的保护主义者出于担心疯牛病而对美国的牛肉硬起了手腕，从而发生了一场纠纷。

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The conversion is also implemented by XSLT, as illustrated in Figure 5.

这种转换也是使用XSLT实现的，如图5所示。

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The internal revenue code is nightmarishly complex, as illustrated by this video.

FORBES: Do The Lawyers Who Write The Tax Code Benefit From Making It Complex?

And after the disappointment of withdrawing from the Beijing Olympics last year, he feels he is learning quickly, as illustrated by his two-round victory over Walsall's Steve Saville last month.

BBC: Gavin targets title tilt in 2010

Though Dixon wears his eco credentials lightly, his crusade to make low-voltage lighting attractive is second to none, as illustrated by Luminosity, a collection of lamps, lights and shades that he also presented last month in Milan.

WSJ: Tom Dixon Makes Things Better