Cách sử dụng
The expression "top secret" is used to describe information that is very important and should not be shared with anyone who is not supposed to know it. This information is kept hidden so that it doesn't fall into the wrong hands or cause harm to anyone. It is a serious matter and needs to be handled with caution. You may hear this expression in the military, government, or when talking about confidential business information. If someone tells you something is "top secret", it means you should not tell anyone else about it.