civil defense

英 美
  • (防止空袭等的)民防系统
  • civil adj.公民的;文明的;国内的;民用的;民事的;【建】土木的
  • defense n.防卫;防卫物;辩护vt.防守
Noun:
  1. activities organized by civilians for their own protection in time of war or disaster