Imagine you are playing with a toy car on a bumpy road. Each bump on the road makes the car move in a different way, but you can still control where the car goes overall. Now imagine that the road is actually a math concept called a manifold.
A real manifold is like a smooth and flat piece of paper, where you can draw nice curves and lines without any problems. A complex manifold is like a piece of paper with a bunch of bumps on it, but these bumps are very special since they are made up of complex numbers, which is a type of math that includes both real numbers (like 1, 2, 3) and imaginary numbers (like the square root of -1).
A real-complex manifold is like a bumpy road that is partly flat and partly bumpy, where the bumps are made up of a mix of real and complex numbers. This means that your toy car will move in a more complicated way than just on a flat road or a bumpy road, but it is still possible to control where it goes overall by using math tools like calculus and geometry.
In summary, a real-complex manifold is a math concept that describes a surface or space with a mix of real and complex bumps, which can be studied using various mathematical techniques.