这些是什么用英语怎么说

"What are these for?"

These can refer to a variety of objects or concepts. To accurately answer this question, you would need to be more specific about what exactly you are referring to. For example, if you are asking about a group of objects, you might say "What are these for?" and then point to each object in turn, e.g. "These are plates. They are for holding food. These are cups. They are also for holding food." If you are asking about a concept, you might say "What are these for?" and then explain the purpose or function of the concept, e.g. "These are instructions. They tell you how to use a product."