graveyard shift

graveyard-shift的词性：
n.（名词）

1. A work shift that runs during the early morning hours, as from midnight to 8 am
夜班：在凌晨时间里工作的一班，如从夜半到早晨 八点

2. The workers on an early-morning shift.
夜班工人：上凌晨班的工人