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
【经】 积压, 积压未交订货
在线英汉词典

backlog的短语、例句：

backlog n (usu sing 通常作单数) accumulation of work or business not yet attended to 积压的工作; 待办的业务
a backlog of work, unanswered letters 积压的工作[待覆信件]
After the postal strike there was a huge backlog of undelivered mail. 邮政部门罢工以後, 大量邮件积压下来.