Consider a single-argument expression that applies averaging on its input expression. Listing 5 shows the CriteriaQuery to select the average balance of all accounts.

考虑一个对输入表达式应用平均值的单参数表达式。

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Note: the query optimizer considers using a functional index when the index expression is used in a relational expression or as an argument to one of the operator class functions.

注意：当索引表达式被用于关系表达式，或作为某个操作符类函数的参数时，查询优化器将考虑使用函数索引。

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The regular expression argument is the routing mechanism.

正则表达式参数是路由机制。

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Another common expression, to hold water, is about the strength or weakness of an idea,opinion or argument.

VOA: special.2009.05.10

In the past, this expression was used as an argument to re-elect a president, especially during a time when the country was at war.

VOA: special.2009.07.12

What happened at Enron (otc: ENRNQ - news - people ), the argument goes, was a perfect expression of capitalism and its excesses.

FORBES: A Virtuous Cycle

Nor can I buy the argument, made here by Joe Weisenthal, that the abandonment of gold equates to a new expression of faith by investors that central bankers and policy makers have more or less fixed our economic problems and that its better to be in stocks, not rocks.

FORBES: Gold Inches Up As Goldbugs Seek Reasons For Historic Rout