used to emphasize that something does not happen before a certain point in time or before something else has happened 直到〔用于强调某事在某个具体的时刻或者另一件事发生以前没有发生〕
‘Can I go out and play now?’ ‘Not until you’ve done your homework.’
“我现在可以出去玩吗?” “家庭作业做完以后才行。”
It was not until 1972 that the war finally came to an end.
直到 1972 年战争才终于结束。
Examples from the Corpus
not until• Actually it was not until 4 June that the submarinesarrived on station.• I will accept your tequila, but not until after you have admitted your wrongs.• He meant to, but addresses didn't seem important - well, not until it was too late.• It was not until the 1880s that there were consistentexperimentalfindings to support localization.• Watkins died in 1935 and it was not until the 1960s that interest in leys again fared.• But, it's not until the sun sets, that the Mar Estang really comes into its own.• It was not until they had just left the Church that Joan discovered they were going for two weeks to Tenerife.