Cách sử dụng
The expression "speak up" means to speak louder or more clearly so that people can hear you better. It is often used in situations where someone is speaking too quietly or mumbling, making it difficult for others to hear or understand what they are saying. For example, if you are giving a presentation and your voice is too soft, someone might say "Please speak up, we can't hear you!" or if you are in a group discussion and someone is speaking too quietly, you might say "Could you speak up a bit, please?"