Cách sử dụng
The expression "sweat blood" means to work extremely hard and put a lot of effort into something. It's used when someone is trying to accomplish a difficult task that requires a lot of energy and dedication. For example, if you have a big project at work and you are working long hours and putting in a lot of effort, you could say "I am sweating blood to get this project done on time." It's a way of describing how hard you are working and the level of commitment you are putting into the task.