quantum leap
noun/ˌkwɒntəm ˈliːp/
/ˌkwɑːntəm ˈliːp/
(also less frequent quantum jump)
- a sudden, great and important change, improvement or development
突变；巨变；飞跃 - This discovery marks a quantum leap forward in the fight against cancer.
这一发现标志着治疗癌症的一大突破。 - There has been a quantum leap in profits since 2015.
自2015年以来，利润实现了巨大飞跃。
- This discovery marks a quantum leap forward in the fight against cancer.