Usages of la sirena
Escucho una sirena muy fuerte, debe de haber un choque.
I hear a very loud siren, there must be a crash.
El accidente fue enorme, la sirena debe de ser de la ambulancia.
The accident was huge, the siren must be from the ambulance.
Caminen hacia la salida apenas suene la sirena.
Walk toward the exit as soon as the siren sounds.
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