Cách sử dụng
Opacity refers to how much something is visible or able to be seen through. For example, if you hold a piece of paper up to the light and you can't see through it, it has a high opacity. If you hold a piece of plastic up to the light and you can see through it clearly, it has a low opacity. You can use the word opacity when talking about anything from the color of paint on a wall to the thickness of a material.