n.

1. 赛跑者
2. 比赛用的汽车（或游艇、马、自行车、飞机等）

n.

1. an animal or vehicle used for racing.
   ▸a person who competes in races.
2. a harmless fast-moving slender snake. [Coluber constrictor (N. America) and other species.]
3. a circular horizontal rail along which the carriage or traversing platform of a heavy gun moves.