[译] 他大学毕业后，在一个政府部门工作。
[误] After his graduation in college, he went to work in a government office.

[正] After his graduation from college, he went to work in a government office.
[注] “graduate from...” 是“从……毕业”，它的同根名词 graduation 后，同样跟介词“from”。