由于查询是动态的，在编译时并不知道其选择标准，因此，即使有了关于数据的完整的分布统计，仍然可能生成错误的计划。
Since the queries are dynamic, with unknown selection criteria at compile time, plan generation can be incorrect, even with the availability of full distribution statistics on the data.
或者，我们是想多一种选择，让自己做正确的决定(即使内心觉得那是错误的)于是，我们向别人寻求建议，告诉我们怎样是正确的。
Or we have an option that we want to be right (even though deep down we know it isn't) so we go looking for advice that will tell us it is.
即使是最十恶不赦的罪行也是源于人们作出的错误的选择，屈服于诱惑。
Even the most heinous of crimes began when someone made a wrong choice and gave into temptation.
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