Cách sử dụng
The expression "at/in the back of your mind" means something that you are not actively thinking about or paying attention to, but is still present in your thoughts. It's like having a thought or idea stored away in your brain in case you need it later. For example, if you're studying for an exam, you might have some key concepts at the back of your mind that you remember but aren't actively focusing on at the moment. It's a way of saying that something is not the main thing you are thinking about, but it's still there in your thoughts.