没有类型名和标识符的联合(union)叫匿名联合(anonymous union),我们访问一个匿名联合的成员就向访问普通的变量一样。唯一的区别就是所有的变量共用同一内存空间
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这个匿名联合体必须用元素嵌套，并且在这个模型的顶部并不存在。
Anonymous unions have to be nested elements and cannot exist at the top level in a model.
例如，如果您在一个模板例子，或匿名联合体中错误地为操作建模，那么这样的操作应该被弃除。
For example, if you have erroneously modeled operations inside of a template instantiation or an anonymous union, then such operations need to be thrown away.
“很多人都不满意 自由 论者正在联合 ”一个匿名大会成员告诉我们 "还有一些茶党人也在这里。”
“A lot of people are unhappy that the Libertarians are joining up, ” one General Assembly member told us on the condition of anonymity, “and there are some Tea Party people here too.”
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