non-proliferation
n[U, esp attrib 尤作定语]
limitation of the number and spread (esp of nuclear and chemical weapons) 不增加和不扩散(尤指核武器和化学武器)
a non-proliferation treaty aimed at stopping the spread of nuclear weapons 旨在制止核武器扩散的防止核扩散条约.
since her parents had impressed upon her that it would be unforgivable to miss it and cause the friends with whom she was going to stay to make two journeys to meet her.