upper shift

例句：

1. 1. Theupper shift is responsible for the morning operations.
   上一班次负责早晨的运营工作。
2. 2.They were assigned to the upper shift tohelp with the emergency repairs.
   他们被分配到上一班次来协助紧急维修工作。
3. 3. The upper shift was busy with preparations for the evening shift.
   上一班次忙于为晚上的班次做准备。