front-line states
/ˈfrʌntˈlaɪn/plural noun
- those countries bordering on an area troubled by a war or other crisis (used particularly of the countries bordering on South Africa and opposed to its policy of apartheid while this was in operation)前线国家（指毗邻受战争或其他危机困扰地区的国家, 尤指与南非接壤并反对其前政府实施种族隔离政策的国家）。