Assignment expressions are shown with opaque actions, where the name of the action contains an assignment expression that references variables, parameters, and structural features in scope.

分配公式通过不透明行动被显示，在那里行动的名称包括一个反映参考变量、参数、结构特性的分配公式。

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JSF has a mechanism for customizing the resolution of top-level variables in JSF el expressions.

J SF具有用于自定义jsf el表达式中的顶级变量的解析的机制。

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Limiting the maximum number of live variables: this is typically achieved by keeping expressions simple and small, and not using too many variables in a function.

限制活变量的最大数目：通常可以使用简单小巧的表达式，在函数内部不使用太多的变量。

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