This is the 11459th most frequent Portuguese word.
observados
"Observed."
In this sentence, 'observados' is the past participle of the verb 'observar', used in a passive construction emphasizing the subjects of observation.
Os pássaros foram observados atentamente pelos cientistas.
The birds were carefully observed by the scientists.
Here, 'observados' functions as part of a recommendation, suggesting the importance of paying attention to the examples.
Estes exemplos devem ser observados para melhor compreensão.
These examples must be observed for better understanding.
The word 'observados' specifies the students in question, emphasizing their state of having been watched or studied.