This is the 4854th most frequent Spanish word.
demostraron
"Demostraron" means "they showed" or "they demonstrated."
Here, 'demostraron' is used in the context of showing or proving something, indicating their understanding or proficiency.
Los estudiantes demostraron su conocimiento en la presentación.
The students demonstrated their knowledge in the presentation.
In this sentence, 'demostraron' refers to the results 'proving' or 'indicating' the effectiveness of the treatment.
Los resultados demostraron la eficacia del nuevo tratamiento.
The results showed the effectiveness of the new treatment.
Here, 'demostraron' is used to indicate the athletes 'exhibited' or 'proved' their physical abilities.