Usages of a sirene
A ambulância passou e a sirene assustou as crianças.
The ambulance went by and the siren scared the children.
Quando a sirene toca, dá-se passagem à ambulância.
When the siren sounds, people give way to the ambulance.
Se a ambulância chegar, o segurança abre o portão e a sirene desliga-se.
If the ambulance arrives, the security guard opens the gate and the siren turns off.
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