This is the 6011th most frequent Chinese word.
學畢業以後
"學畢業以後" means "after graduating from school."
學畢業以後 is used as a time clause indicating when the action (traveling) will take place.
我學畢業以後打算去旅行。
After graduating, I plan to travel.
學畢業以後 is employed to specify the time after which he started his career, connecting two events.
學畢業以後，他開始了自己的職業生涯。
After graduating, he started his professional career.
學畢業以後 points to the time following graduation when further actions or plans could be contemplated.