[] () the percentage of buildings, offices, etc. that are available to be sold or rented at a particular time（建筑物、写字楼等的）空置率◆The office vacancy rate in the city has risen to 15%.这个城市写字楼的空置率上升至 15%。 () the percentage of jobs that are available to be filled（职位的）空缺率◆The high staff vacancy rate in the industry is partly due to low levels of pay.这个行业较高的职位空缺率部分原因是工资水平太低。