需要显式地指定对象的MRO，而不是依赖于通过继承语法建立的隐式解析，这似乎不太方便。
It might seem limiting to need to explicitly specify the MRO of an object rather than rely on its implicit resolution through inheritance syntax.
作为一种特殊情况(在yacc中是隐式的，没有在语法中声明)，0标记表示不再有任何标记，解析结束。
As a special case (implicit in yacc, rather than stated in the grammar), a 0 token indicates that there are no more tokens, and ends parsing.
作为一种特殊情况(在yacc中是隐式的，没有在语法中声明)，0标记表示不再有任何标记，解析结束。
As a special case (implicit in yacc, rather than stated in the grammar), a 0 token indicates that there are no more tokens, and ends parsing.
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