您甚至可以合并历史表达式来生成！
You can even combine history expressions to yield sigil soup such as!
表达式语言最初是JSTL的一个主要特性，后来合并到了JSP 2.0标准。
Defined initially as a main feature of JSTL, the expression language was later incorporated into the JSP 2.0 standard.
例如，通过合并其两个操作数的枚举使在联合表达式上调用enumerate可行。
Calling enumerate on a union expression, for example, works by merging the enumerations of its two operands.
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