What is the difference between the main and transitional climatic zones?

There are a number of differences between the climatic zones that we used to call the main ones and those that are transitional from them. This primarily concerns air masses. They do not change in the main zones, they are there all year round. But in transitional ones, they change twice a year. I will give a vivid and eloquent example, take the subtropical zone, in summer there the climate is typical for the tropics, tropical air mass dominates, but in winter there is air mass from the temperate zone. And so it is constantly. Transition belts have a sub prefix.