top gear

例句：

1. 1. The car was in top gear on the racetrack.
   赛车在赛道上以最高速度行驶。
2. 2. She drove at top gear to get to work on time.
   她以最高速度开车上班，以免迟到。
3. 3. The driver must be in top gear to win this race.
   这位赛车手必须以最高速度赢得这场比赛。