1. Third person singular present indicative of 'perceber' in reflexive form, expressing that something is noticed, observed, or understood passively or impersonally
It can be seen that the market is improving.
Percebe-se que o mercado está melhorando.
2. An impersonal construction indicating general perception or observation
One can tell from his expression that he is nervous.
Percebe-se pela sua expressão que ele está nervoso.