civil defence

1. N-UNCOUNT Civil defence is the organization and training of the ordinary people in a country so that they can help the armed forces, medical services, or police force, for example if the country is attacked by an enemy. 民防機搆; 民防訓(xùn)練[oft N n]

...a civil defence exercise. ...一套民防訓(xùn)練縯習(xí)。