例句與造句

1. Type-2 grammars generate the context-free languages.
2. Extended context-free grammars describe exactly the context-free languages.
3. There exists a Pumping lemma for context-free languages.
4. Context-free languages are not closed under difference.
5. Not all context-free languages are deterministic.
6. It's difficult to find context - free language in a sentence. 用context - free language造句挺難的
7. CD is eliminated from the above, then one obtains context-free languages.
8. Let L be a context-free language.
9. Thus, every context-free language is commutatively equivalent to some regular language.
10. Earley parsers are appealing because they can parse all context-free languages reasonably efficiently.
11. Parser algorithms for context-free languages include the CYK algorithm and Earley's Algorithm.
12. Description : LR parser, which does bottom up parsing for deterministic context-free languages.
13. Since the context-free languages form a cone, they are closed under this exotic operation.
14. The language of strings accepted by a deterministic pushdown automaton is called a deterministic context-free language.
15. Both properly contain the context-free languages and are properly contained in the family of quasirealtime languages.
16. Deterministic context-free languages can be recognized by a deterministic Turing machine in polynomial time and complement.
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