a leap forward的用法和樣例：
例句
- In the last few years,this art has made a big leap.
近幾年來，這一藝術有了新的躍進。 - If one day we can cure cancer, it would be a quantum leap in medicine.
假如有一天我們能治好癌症，那是醫藥上的重大躍進。 - This time I noticed a great change in her.
這次我注意到她發生了很大變化。 - By the end of the novel, Pip has changed a lot.
小說結尾時，皮普有了很大變化。
