thank you and what does this mena?

I use "./bro -i eth0 tcp.bro" and it prints many lines,would you please tell me the meaning of each components of every line of the log?for example:

1021692805.796063 weird:spontaneous_FIN
1021692805.796063 0.0700001 other-8080 604 ? RSTOSO X

thank you for kind help and patience.

In bro user manual, which you can find in the doc/ directory
See section 5.3.6 for the format of connection summary.