Yacc can look ahead one character, though. So.
但是，yacc可以预读一个字符，所以。
Most people never need to know what lex and yacc do.
大部分人永远不需要知道lex和yacc可以做什么。
What are lex and yacc, and why do people refer to them together?
lex和yacc 是什么，为什么人们同时提及它们？
What are lex and yacc, and why do people refer to them together?
lex和yacc 是什么，为什么人们同时提及它们？
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