D15 leapfrog 20190126
1）翻译下面的句子：
David 超越了他的同班同学，只用两年半就拿到了本科学位。
David leapfrogged his classmates and obtained his bachelor’s degree within two and a half years.
（参考翻译：David leapfrogged his classmates and obtained his bachelor's degree within just two and a half years.）
2）结合自己的生活、学习、工作、兴趣等，想象在什么语境下会用到这个表达。先简要描述这个场景，再造句。
例子：
Thanks to a happy combination of innovation and falling costs for chips, Apple leapfrogged ahead not once but twice, skipping both traditional mobile phone company such as Nokia and most technology enterprises.
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