quantum leap

quantum-leap的词性：
n.（名词）

1. An abrupt change or step, especially in method, information, or knowledge:
突飞猛进：突然的变化或进步，尤指在方法、信息或知识方面的：

“War was going to take a quantum leap; it would never be the same”(Garry Wills)
“战争将发生重大变化；它再也不同先前了”(加里·威尔斯)