Cách sử dụng
The word 'underlay' means to put something under something else. For example, when you put a rug on a wooden floor, you may put a soft material under it to make it more comfortable to walk on. That soft material is called an underlay. Another example could be when you're laying down tiles on a floor or wall, you'll put an underlay, like a layer of cement or adhesive, to help the tiles stick properly. So, 'underlay' means adding something underneath to support, cushion, or secure something else.