Cách sử dụng
The expression "work up" means to gradually build or develop something, usually through effort or practice. It can be used in different contexts, such as:1. To work up an appetite: When you are hungry, you can say "I need to work up an appetite" before eating.2. To work up a sweat: When you exercise and become sweaty, you can say "I worked up a sweat at the gym."3. To work up the courage: When you need bravery to do something difficult or scary, you can say "I had to work up the courage to ask my boss for a raise."4. To work up a plan: When you need to figure out a strategy, you can say "Let's work up a plan to finish this project on time."Overall, "work up" means to gradually achieve or create something through effort or practice, and it can be used in various situations.