jack sth ↔ up 1. to lift something heavy off the ground using a jack〔用千斤顶〕顶(托)起〔重物〕:•Jack the car up higher – I can't get the tire off.把车再顶高些,车胎卸不下来。2. informalto increase prices, sales etc by a large amount大幅度提高〔价格、销量等〕:•They're just interested in jacking up their profit margins.他们只对大幅度提高利润感兴趣。 |