宿舍里非常安静，只听到睡着的学生均匀的呼吸声。

The dormitory was very quiet, with only the steady breathing of the ___sleepers heard.

工人们正在更换铁轨下腐朽的木枕。

The workers are replacing the rotten wooden ___sleepers under the railway tracks.

我买了一双新拖鞋，面料特别柔软。

I bought a new pair of ___slippers, and the fabric is super soft.

这款最初销量平平的手机后来成为了市场的黑马。

The phone initially had poor sales but later became one of the biggest ___sleepers in the market.