n. an accumulation of jobs not done or materials not processed that are yet to be dealt with (especially unfilled customer orders for products or services)
n. the large log at the back of a hearth fire
v. accumulate and create a backlog
n. 积压待办的事务, 积压而未交付的订货, 积压的工作
vt. 储备, 把...积压起来
[计] 储备, 后备, 积压