1 N-COUNT (战争中的)前线,前方 The front line is the place where two opposing armies are facing each other and where fighting is going on. (战争中的)前线,前方
2 ADJ [ADJ n] (国家)位于战争(或冲突)前线的,与敌对国毗邻的 A front line state shares a border with a country that it is at war with or is in conflict with. (国家)位于战争(或冲突)前线的,与敌对国毗邻的
3 PHRASE 处于第一线;居于极重要岗位 Someone who is in the front line has to play a very important part in defending or achieving something. 处于第一线;居于极重要岗位