short sleeper meaning in English

短时睡眠者
短睡者

The practice of renewal of monolithic track bed with short sleeper in tunnel
隧道内短枕整体道床改造工程实践
Construction technology of short sleeper ballastless track with new type vibration reducing fastener
扣件短轨枕轨道工程施工技术
Hormonal changes triggered by darkness or other unknown biological effects from long sleep could be affecting survival , kripke says . but short sleepers may suffer other bad effects
克里普卡说，黑暗或其他由长时间睡眠引起的未知生理反应会导致荷尔蒙发生变化，这会影响寿命。