mass noun
1- short for HORSE RACING.HORSE RACING的简称。
1.1
- any sport that involves competing in races速度比赛：
cycle racing
自行车赛
yacht racing.
快艇比赛。
1
- moving swiftly快速移动的, 飞快的：
he controlled his racing thoughts.
他极力控制飞快的思绪。
2
- (of a person) following horse racing（人）热衷于赛马的：
Kevin was not a racing man.
凯文不是个赛马迷。