to risk money on someone or something winning a race or competition

He put some money on a horse in the five o'clock race. 他在五点钟那场比赛的一匹马身上下了赌注。

to strongly believe that someone will do something or that something will happen

Chris will be promoted - I'd put money on it. 克里斯将得到提升——这点我深信不疑。