- an area where the enemies are facing each other during a war and where fighting takes place前线
- Tanks have been deployed all along the front line.整个前线全都部署了坦克。🔊🔊
- in/on the front line The regiment was sent to fight in the front line.这个团被派到前线作战。🔊🔊
- front-line troops前线部队
Topics War and conflictc2 - the most important position in a debate or an area of work在最重要的岗位上；在第一线
- in the front line (of something) a life spent in the front line of research在研究的第一线度过的一生
- on the front line (of something) They are on the front line, talking to the customers about our products.他们在第一线，与客户谈论我们的产品。