1.They practiced the dance until it was perfect.他们反复练舞，直到尽善尽美为止。

2.Beat the butter and sugar until soft and fluffy.搅打奶油和糖直到松软为止。

3.The party remained on the fringe of the political scene until last year.直到去年为止这个政党一直处在政治舞台的外围。