Cách sử dụng
The expression "dust off" means to remove the dust or dirt from something, typically by wiping or brushing it. It can also be used to mean to refresh or revive something that has been unused or neglected for a long time. For example, you might say "I need to dust off my old guitar and start playing again" or "I had to dust off my math skills to solve that problem." It is a useful expression for talking about cleaning or revitalizing something that hasn't been used in a while.