ground zero
Word family noungroundagegroundergroundinggroundlessnessgroundlinggroundbaitgroundbreakinggroundburstground controlground floorgroundhogGroundhog Daygroundhoppergroundmassgroundnutground plangroundplotgroundproxground rentgroundselgroundsheetgroundsmangroundspeedground squirrelground staffground strokegroundswellgroundworkground zerogroundadjectivegroundedgroundlessadverbgroundedlygroundlessly
ˌground ˈzero noun [uncountableU] the exact place where a bomb explodes 〔炸弹的〕着地点 Buildings within 25 km of ground zero would be flattened. 着地点25公里以内的建筑物都将被夷为平地。