Complex sentence: If the crystallographic orientations are not random, but have some preferred direction, then the sample has a weak, strong, or moderate texture depending on the percentage of crystals that have the preffered orientation.
Split into simpler sentences: If the crystallographic orientations are not random, but have some preferred direction, then the sample has a weak, strong, or moderate texture. The degree is dependent on the percentage of crystals that have the preffered orientation.