Translate the given Spanish text to English

[EX Q]: At least one predetermined function is then applied to combine the primary features with the secondary features.
[EX A]: Al menos una funcion predeterminada se aplica entonces para combinar las caracteristicas primarias con las caracteristicas secundarias.

[EX Q]: It is dismountable and adjustable.
[EX A]: Es desmontable y ajustable.

[EX Q]: The matrix material can be glass, fused silicas, or metal.
[EX A]:
El material de matriz puede ser vidrio, sílices fusionadas o metal.