有用的用英语怎么说

"useful" in English is a term that describes something that has practical significance or value. It can be used to describe a wide range of things, from tools and equipment, to information and knowledge, to skills and abilities. For example, a tool that is well-maintained and easy to use would be considered useful. Information that is accurate and helpful in making decisions would also be considered useful. A skill that is useful in everyday life or a specific profession would also be considered useful. Overall, anything that provides practical benefit or value can be described as useful.