front line
美 
英 
- n.前线
 - 网络第一线;火线;前沿
 
n.
front,war zone,battle zone,combat zone,ground zero
front line
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1.  | 前线an area where the enemies are facing each other during a war and where fighting takes place  | 
Tanks have been deployed all along the front line. 沿整个前线已部署了坦克。  | |
front-line troops 前线部队  | 
IDM
a life spent in the front line of research 在研究的第一线度过的一生  | 
in the front line (of sth)
在最重要的岗位上;在第一线doing work that will have an important effect on sth
a life spent in the front line of research 在研究的第一线度过的一生  |