Task: Translation
Input (Spanish): Sin embargo, para que el mercado interior funcione de forma eficaz y para que la moneda única europea tenga éxito, es fundamental que todas las regiones de Europa, más de 100, puedan competir económicamente en un entorno tan desafiante.
Output (English): But for the internal market to work effectively and for the single European currency to be a success it is important that all regions within Europe, of which there are over 100, can economically compete within this very challenging environment.