Cách sử dụng
The expression "rack up" means to accumulate or gather something. It is often used in a situation where a person is trying to achieve a goal or get a high score. For example, a person could say "I'm trying to rack up as many points as possible in this game" or "I need to rack up more hours at work to qualify for overtime pay." The expression can be used in a variety of contexts, such as sports, work, and personal goals.