网络释义专业释义英英释义
... 二义性句子 ambiguous sentence 二义性文法 ambiguous grammar 二义性问题 ambiguity problem ...
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基于神经网络的自主式地面车辆） Autonomous Land Vehicle in a Neural Net 多义文法 ambiguous grammar 美国国家标准化学会 American National Standards I titute ..
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... 歧义文法 ambiguous grammar 歧义语言 ambiguous language 组合型模糊词组 ambiguous phrase of combination type ...
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Ambiguous grammar
- abstract: In computer science, an ambiguous grammar is a formal grammar for which there exists a string that can have more than one leftmost derivation, while an unambiguous grammar is a formal grammar for which every valid string has a unique leftmost derivation. Many languages admit both ambiguous and unambiguous grammars, while some languages admit only ambiguous grammars. Any non-empty language admits an ambiguous grammar by taking an unambiguous grammar and introducing a duplicate rule or synonym (the only language without ambiguous grammars is the empty language). A language that only admits ambiguous grammars is called an inherently ambiguous language, and there are inherently ambiguous context-free languages. Deterministic context-free grammars are always unambiguous, and are an important subclass of unambiguous CFGs; there are non-deterministic unambiguous CFGs, however.
以上来源于: WordNet
双语例句
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You do not have to worry about backtracking and action side effects that may occur with an ambiguous grammar.
你不需要担心一个模糊语法可能的回溯和动作的副作用。
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But in truth, my grammar has a lot of problems when it encounters ambiguous phrases.
不过说实话，当遇到含糊的短语时，我的语法会有很多问题。
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This grammar is ambiguous; yacc can't figure out what's going on.
该语法是不明确的；所以yacc无法指出接下来将做什么。
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