Original: Béchamel sauce (in English, in French, in Italian), also known as white sauce, is a basic sauce that is used as the base for other sauces, such as Mornay sauce, which is Béchamel and cheese.
Simplified: Béchamel sauce (in English, in French, in Italian), also known as white sauce, is a basic sauce. It can be used to make other sauces, such as Mornay sauce, which is Béchamel and cheese.