你写程序实际上是在写语法树-而其它语言需要编译器生成这种内部表示。
You write programs in the parse trees that get generated within the compiler when other languages are parsed.
它们可以表示为有序的向量、无序的组、链表、树、图或编程语言支持的其他形式。
They can be expressed as ordered vectors, unordered groups, linked lists, trees, graphs or other forms that the programming language supports.
表达式树在任何语言中都是一个强大的功能。
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