劍橋詞典a place where opposing armies face each other in war and where fighting happens （戰(zhàn)爭）前線 Tens of thousands of soldiers died on the front line . 數(shù)以萬計(jì)的士兵在前線陣亡。 More front-line troops will be flown to the battle zone over the next few days . 今後幾天將會有更多的前線部隊(duì)被調(diào)往交戰(zhàn)區(qū)域。 習(xí)語be in the front line 返回 the front line