n.睡眠者；枕木；卧铺；爆冷门；耳环
I am a bad sleeper. 我总睡不好。
Many sleepers were fixed on a railway. 一条铁路上有许多固定了的枕木。
He usually goes home on the sleeper. 他通常乘卧铺车回家。
The football game was won by a sleeper,an unknown new player. 足球比赛爆冷门，有一匹黑马赢球了，是一个名不见经传的新球员。
n.枕木
