“占上风”，是指占据有利地位、处于优势（have the advantage (over)）。常用于比赛或者战场等相互竞技时，对于有优势的一方用占上风。与英文惯用语“ have/gain the upper hand”意思相同，表示“have or gain advantage or control over someone or something”。
例句：
我们的死对头下半场开始占上风，最后我们在自己的地盘上输掉了比赛。
Our arch-rival gained the upper hand in the second half and beat us on our home turf.
当对手的明星四分卫受伤出局时，主队占了上风。
The home team had the upper hand when their opponents' star quarterback went out with an injury.