After decades of programming I don't even think about these three ways to read code. I just glance at it and know what it means. I can even glance at a whole screen of code, and all the bugs and errors jump out at me. That took
an incredibly long time and quite a bit more study than is sane.
To get that way, I learned these three ways of reading most any programming language:
Front to back. (从前往后)
Back to front.(从后往前)
Counter-clock-wise. (逆时针看)