Cách sử dụng
The word 'substance' refers to the material or matter that something is made of. It can be used in various contexts, for example: when talking about the chemical properties or components of something, like a medication or drug; when discussing the fundamental nature or essence of a thing or concept, like the substance of an argument or theory; or when referring to physical objects or substances like food, drink, or minerals. Essentially, 'substance' means the tangible, physical elements that make up something.