Cách sử dụng
The expression "act upon" means to take action or make a decision based on something. For example, if you receive advice from a friend, you can act upon their advice by following it. Another example is if you have a task to complete, you can act upon it by starting to work on it. This expression is often used in formal or professional settings, such as in business or legal contexts, but can also be used in everyday conversation.