無薪假

無薪假我查到的答案有兩種
unpaid furlough
unpaid leave

furlough

/ ˋfəlo/ n [C, U] (permission for) absence from duty, esp that granted to civil servants, soldiers, etc working abroad

Back in 2003, Gulfstream's Savannah facility furloughed 1,000 employees over the summer.

AmE a period of time when workers are told not to work, especially because there is not enough money to pay them

workers forced to take a long, unpaid furlough (無薪假)