This is the 13119th most frequent Spanish word.
precisan
"They need" or "they specify," depending on context.
In this sentence, 'precisan' is used to indicate necessity or need, meaning that students require textbooks.
Los estudiantes precisan libros de texto para las clases.
Students need textbooks for their classes.
Here, 'precisan' also conveys the need for something essential, indicating that doctors require specific details.
Los médicos precisan detalles claros para diagnosticar problemas.
Doctors require clear details to diagnose problems.
In this case, 'precisan' indicates an action required to achieve improvement; it expresses the idea of necessity.