ground zero
noun uk/ˌɡraʊnd ˈzɪə.rəʊ/ us/ˌɡraʊnd ˈzɪr.oʊ/
[ C usually singular ]（核弹的）爆心投影点
the exact place where a nuclear bomb explodes
The blast was felt as far as 30 miles from ground zero. 这次核爆炸在30英里外都感觉得到。
Ground Zero （毁于2001年9月11日恐怖袭击的）纽约世界贸易中心遗址
the place where the World Trade Center stood in New York City before it was destroyed in an attack on 11 September, 2001