[uncountable] people, money, time or space that a company is not using fully
（公司中人员、资金、时间或空间等的）富余部分，闲置部分◆There's very little slack in the budget.
预算中没有多少富余款项。 ●pick/take up the ˈslackto do sth, supply sth, etc. that is needed but is not being done or supplied
利用闲散资源；弥补短缺◆Her colleagues have to take up the slack when she is away from work.
她外出时，她的同事必须接手她的工作。◆As desktop PC sales have fallen, laptops have taken up the slack.
随着枱式个人电脑销售额的下降，膝上型电脑的销售额反之上升。