为首

In a sentence

• 这次会议由美国总统为首，讨论了许多全球性议题。

  This meeting, led by the President of the United States, discussed many global issues.

  这里为首表明由美国总统作为领导者或首领。

• 抗议活动以年轻人为首，呼吁社会重视环保问题。

  The protest was led by young people, calling for society to pay attention to environmental issues.

  这里为首表示由年轻人作为主要的倡议者。

• 在比赛中，以他们队长为首的一批球员表现得非常出色。

  In the game, a group of players led by their captain performed exceptionally well.

  这里为首描述队长以领导的角色出现。