前线的英文：
military front line; edge of a construction site
frontline

参考例句：

Ms Ho will stand as an independent instead of under the umbrella of The Frontier.
何秀兰今次会以独立名义参选，不再以前线名义参选。

The American soldier went to the font again and was put in the bag and sent to some Boche prison.
那个美国士兵再次上了前线，但却成了俘虏，被押进德国鬼子的监狱。

frontier orbital theory
前线轨道理论

The cavalry charged to the front.
骑兵队向前线猛冲。

The regiment was ordered to the front.
这个团被调往前线。

Reinforcements were sent to the Battle front.
援兵被派赴前线。

(of soldiers,supplies,etc)be moved to the front line
(指士兵、给养等)被送往前线.

A newsflash has this moment arrived from the Malabar Front.
现在我们收到马拉巴前线的急电。

To make a courageous show or to put up a stalwart front.
做勇敢状或建起一道坚固的前线

The new recruits were trained for six months and then sent to the war front.
新兵训练六个月后被送上了前线。

military是什么意思：
n. 军队；武装力量；军人
adj. 军事的；军人的

Expand military blocks and strengthen military alliances
扩大军事集团、强化军事同盟

To take a meal in a military mess.
聚餐在军队的集体用膳食堂吃饭。

A local organization of military veterans.
退伍军人协会的地方分会

front是什么意思：
n. 正面，前面；前线；幌子
v. 面对，朝向；作为…的领袖；作为…的主唱
adj. 前面的；正面的

It is the closest writing awesomely in the front article of the front page.
它最近的头版头条赫然写着“理财规划师建议：缩短寿命”这一标题。

Marble will front the building.
大楼的正面将以大理石作装饰。

playing in front of their home crowd
在本地群众面前的比赛.

line是什么意思：
n. 线条，界线，路线；条纹；排；铁路线；生产线；台词；态度；防线；前线
v. 用线标出，划线于；使布满纹络；加衬里于；排队，排列成行

This is a lined trunk.
这是一个有衬里的箱子。

They are politically in line.
他们在政治上意见一致。

On a map there are horizontal lines and vertical lines.
在地图上有水平的线和垂直的线。