戰場上那條真正的線
這一家就是畫面本身，還沒有變成比喻。
noun · B2
In a war, the place where the two sides are closest to each other and where the fighting happens; usually said as 'the front line'.
前線
核心畫面
Draw a line across a map. On one side is your group; on the other side is whatever you are up against. The front line is the edge where the two actually touch. It is the first place anything reaches you, and the last place you can stand before it does. People behind the line hear about things later and more gently. People on the line get them first, unfiltered, and cannot step back.
可以想成在地圖上畫一條線。線的一邊是自己人，另一邊是要面對的那一方。front line 就是兩邊真正碰到的那條邊。…更多收起
可以想成在地圖上畫一條線。線的一邊是自己人，另一邊是要面對的那一方。front line 就是兩邊真正碰到的那條邊。事情從那裡先進來，也在那裡先被擋住。線後面的人晚一點才知道，而且知道的是整理過的版本。線上的人第一個碰到，碰到的是原本的樣子，而且退不了。Four branches
把難題當成另一邊：最前沿的努力
地圖還在，只是對面換成了疾病、無知或某個沒人解決過的難題。誰最直接對上它，誰就在線上。
noun · B2
The place where the newest and hardest work on a problem is being done, by the people dealing with it first and most directly.
最前沿；第一線的努力
機構碰到外面世界的那一面
把地圖縮小到一間公司或一家醫院。線的一邊是辦公室，另一邊是客人、病人、家長。站在交界上的人，第一個接到所有東西——包括好消息和抱怨。
noun · B2
The part of an organization where staff meet customers or the public face to face and do the everyday work, rather than managing from an office.
第一線（直接面對人的位置）
球場上最靠近對方球門的那一排
足球場上一樣是一條一條的線，對面一樣有另一隊。最前面那一排離對方球門最近，也最先撞上對方的防守。
noun · B2
In football, the attacking players taken together — the ones who play nearest to the other team's goal.
前鋒線