on the battlefield

基本解释

One should never succumb to fatigue when alone on the battlefield.
一個士兵永遠不該在戰場上屈服於睏倦。
The laser also can flexibly support missions on the battlefield as well as in urban operations.
激光器還可以在戰場上或在城區中霛活地支持作戰任務。
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They often separate the good from the bad (and ugly); and, on the battlefield, the living from the dead.
它們常常能從惡（和醜陋）中分離出善；竝且在戰場上能決定生死。

The human remains were moved from other places on the battlefield and put into graves in the new cemetery.
That is, this kind of aristocratic outfit, aristocracy of birth, which is legitimized by heroic behavior on the battlefield.
也就是說,由於他們在戰場上的英雄行爲,他們的貴族的身份和貴族出身是被認可的
耶魯公開課 - 古希臘歷史簡介課程節選
The question is would the defeated army- would the winning army kill all the defeated guys who were still on the battlefield at the time?
你問的是戰敗軍,勝利的一方是否會殺死,戰敗但仍在戰場上的敵人
耶魯公開課 - 古希臘歷史簡介課程節選

You know, the entire country, certainly, of Iraq and even Afghanistan is basically on the battlefield.
NPR: Women in Combat: Rules and Reality