2N-COUNT [usually singular]突出阵线,突出部(战线向敌人阵地推进的狭小范围) A salient is a narrow area where an army has pushed its front line forward into enemy territory. 突出阵线,突出部(战线向敌人阵地推进的狭小范围) [military]
The soldiers had to remain in a deathtrap salient for most of the rest of the war.