Cách sử dụng
The expression "a/the world of difference" is used to describe a significant change or improvement in something. For example, if you make some changes in your lifestyle and start exercising regularly, you might say that it makes a world of difference to your health. Similarly, if you upgrade your computer, it can make a world of difference in the speed and efficiency of your work. So, whenever something brings a positive change that is noticeable or significant, you can use the expression "a/the world of difference".