李硕铭 开发者_运维知识库 2021-08-01 13:31 笺间天地深文中趣味长qkoufu6092 开发者_如何学Go
This a follow up on my previous question. link here. My question is: Let\'s say I have the following code..
I have a grammar defined as follows: A -> aA开发者_运维知识库*b | empty_string Is A a regular expression?I\'m confused as to how to interpret a BNF grammar.No, this question doesn\'t actually ha
蝴蝶特点；身体分为头、胸、腹、两对翅、三对足，在头部有一对锤状或棒状触角，触角端部加粗，蝶翅宽大，停歇时蝶翅竖立于背上。蝴蝶大多数体型属于中型至大型，翅展在15~260毫米之间，有2对膜质的翅。蝴蝶分
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