Translate the given Spanish text to English

Example Input: The invention also relates to the use of said silicas as polymer reinforcing fillers.
Example Output: La invencion tambien se refiere al uso de dichos silices como cargas de reforzamiento de polimero.

Example Input: A primary transformation is applied to a source speech signal to extract primary features therefrom.
Example Output: Se aplica una transformacion primaria a una senal vocal de origen para extraer caracteristicas primarias de la misma.

Example Input: Systems and methods are provided for operating a condenser fan.
Example Output:
Se proporcionan sistemas y métodos para operar un ventilador del condensador.