Cách sử dụng
The expression "on the job" is used to talk about when someone is working at their job or performing a task for their job. For example, if someone is a teacher, when they are in the classroom teaching their students, they are "on the job". Or if someone is a mechanic and they are fixing a car, they are "on the job" at their work. It basically means that they are working and doing what they are paid to do.