backlog

n. /ˈbæklɑːɡ/ C1

积压的工作；积压待办事务

A quantity of work or orders that has built up.

仙境例句

While the Rabbit hunted for his gloves, a backlog of letters grew on his desk.

白兔忙着找手套，书桌上积压的信越堆越高。