战

In a sentence

• 战争是人类历史的重要主题之一。

  War is one of the crucial themes in human history.

  Here, '战' is part of the word '战争' (war), which refers to conflicts or wars between groups or nations.

• 为了和平，他参战了。

  For the sake of peace, he joined the battle.

  Here, '战' is used in '参战', which means to participate in a battle or war, indicating action.

• 他们的友谊在困难中经受住了考验，战胜了所有的挫折。

  Their friendship endured difficulties and overcame all setbacks.

  Here, '战' appears in '战胜', meaning to overcome or defeat, symbolizing success over obstacles.