Lex tries each rule in order, matching the longest stream of input it can.
lex依次尝试每一个规则，尽可能地匹配最长的输入流。
The COBOL Person message arrives in the form of an input bit stream.
COBOLPerson消息以输入位流的形式到达。
How to get the content of an input stream in reverse order?
如何获得一个输入流的内容以相反的顺序吗？
How to get the content of an input stream in reverse order?
如何获得一个输入流的内容以相反的顺序吗？
应用推荐