Cách sử dụng
The expression "tune up" generally means improving or adjusting something to make it better or work properly. We often use it when talking about vehicles, such as going to a mechanic to get a tune-up to make sure the engine is running well. However, it can also be used in other contexts, such as tuning up a musical instrument before a performance. Overall, the expression is often used to convey the idea of getting something in good working order or preparing it for maximum performance.