ground zero
US /ˌɡraʊnd ˈzɪr.oʊ/
UK /ˌɡraʊnd ˈzɪr.oʊ/

1.
marco zero, epicentro
the point on the earth's surface directly above or below a nuclear explosion or other large bomb
:
•
The city center was declared ground zero after the bombing.
O centro da cidade foi declarado marco zero após o bombardeio.
•
Scientists studied the effects of the blast at ground zero.
Cientistas estudaram os efeitos da explosão no marco zero.
2.
Ground Zero, local do World Trade Center
the site of the World Trade Center in New York City, destroyed in the terrorist attacks of September 11, 2001
:
•
A memorial now stands at Ground Zero in New York City.
Um memorial agora está em Ground Zero na cidade de Nova York.
•
Many people visit Ground Zero to pay their respects.
Muitas pessoas visitam o Ground Zero para prestar suas homenagens.
3.
ponto zero, nível básico
the very beginning or most basic level of something
:
•
We have to go back to ground zero and rethink our entire strategy.
Temos que voltar ao ponto zero e repensar toda a nossa estratégia.
•
His understanding of the subject is still at ground zero.
Sua compreensão do assunto ainda está no ponto zero.