keep ahead

• (竞争、比赛等)保持领先地位；保持在前面：

  If he continues to keep ahead, he will win the race.

  如果他继续保持领先地位，他将赢得这场比赛。

  You have to work hard to keep ahead in your class.

  要想在全班保持成绩领先，你就必需努力学习。