be on the razor's edge | be on a ˈrazor edge
to be in a difficult situation where any mistake may be very dangerous
be on the razor's edge | be on a ˈrazor edge
to be in a difficult situation where any mistake may be very dangerous
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005