common sense
US /ˈkɑː.mən ˌsens/
UK /ˈkɑː.mən ˌsens/

1.
bom senso, senso comum
good sense and sound judgment in practical matters.
:
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Use your common sense to solve the problem.
Use seu bom senso para resolver o problema.
•
It's just common sense to wear a helmet when cycling.
É apenas bom senso usar capacete ao andar de bicicleta.