Cách sử dụng
The word "backbone" can be used to refer to the part of your body that runs down your back and helps you stand up straight. It is also often used to describe someone who has a strong and dependable character, as if they have a strong backbone that helps them stick to their principles. In a more literal sense, it can also refer to the main supporting structure of something, like the spine of a book or the structural pillars of a building.